Appears 44 times in the Quran. (Root: نفس)
  1. They desire to deceive Allah and those who believe, and they deceive only themselves and they do not perceive.

  2. And We made the clouds to give shade over you and We sent to you manna and quails: Eat of the good things that We have given you; and they did not do Us any harm, but they made their own souls suffer the loss.

  3. Evil is that for which they have sold their souls-- that they should deny what Allah has revealed, out of envy that Allah should send down of His grace on whomsoever of His servants He pleases; so they have made themselves deserving of wrath upon wrath, and there is a disgraceful punishment for the unbelievers.

  4. And they followed what the Shaitans chanted of sorcery in the reign of Sulaiman, and Sulaiman was not an unbeliever, but the Shaitans disbelieved, they taught men sorcery and that was sent down to the two angels at Babel, Harut and Marut, yet these two taught no man until they had said, "Surely we are only a trial, therefore do not be a disbeliever." Even then men learned from these two, magic by which they might cause a separation between a man and his wife; and they cannot hurt with it any one except with Allah's permission, and they learned what harmed them and did not profit them, and certainly they know that he who bought it should have no share of good in the hereafter and evil was the price for which they sold their souls, had they but known this.

  5. A party of the followers of the Book desire that they should lead you astray, and they lead not astray but themselves, and they do not perceive.

  6. The likeness of what they spend in the life of this world is as the likeness of wind in which is intense cold (that) smites the seed produce of a people who haw done injustice to their souls and destroys it; and Allah is not unjust to them, but they are unjust to themselves.

  7. And those who when they commit an indecency or do injustice to their souls remember Allah and ask forgiveness for their faults-- and who forgives the faults but Allah, and (who) do not knowingly persist in what they have done.

  8. Then after sorrow He sent down security upon you, a calm coming upon a party of you, and (there was) another party whom their own souls had rendered anxious; they entertained about Allah thoughts of ignorance quite unjustly, saying: We have no hand in the affair. Say: Surely the affair is wholly (in the hands) of Allah. They conceal within their souls what they would not reveal to you. They say: Had we any hand in the affair, we would not have been slain here. Say: Had you remained in your houses, those for whom slaughter was ordained would certainly have gone forth to the places where they would be slain, and that Allah might test what was in your breasts and that He might purge what was in your hearts; and Allah knows what is in the breasts.

  9. And We did not send any messenger but that he should be obeyed by Allah's permission; and had they, when they were unjust to themselves, come to you and asked forgiveness of Allah and the Messenger had (also) asked forgiveness for them, they would have found Allah Oft-returning (to mercy), Merciful.

  10. And do not plead on behalf of those who act unfaithfully to their souls; surely Allah does not love him who is treacherous, sinful;

  11. And were it not for Allah's grace upon you and His mercy a party of them had certainly designed to bring you to perdition and they do not bring (aught) to perdition but their own souls, and they shall not harm you in any way, and Allah has revealed to you the Book and the wisdom, and He has taught you what you did not know, and Allah's grace on you is very great.

  12. Certainly We made a covenant with the children of Israel and We sent to them messengers; whenever there came to them an messenger with what that their souls did not desire, some (of them) did they call liars and some they slew.

  13. You will see many of them befriending those who disbelieve; certainly evil is that which their souls have sent before for them, that Allah became displeased with them and in chastisement shall they abide.

  14. Say: To whom belongs what is in the heavens and the earth? Say: To Allah; He has ordained mercy on Himself; most certainly He will gather you on the resurrection day-- there is no doubt about it. (As for) those who have lost their souls, they will not believe.

  15. Those whom We have given the Book recognize him as they recognize their sons; (as for) those who have lost their souls, they will not believe.

  16. And they prohibit (others) from it and go far away from it, and they only bring destruction upon their own souls while they do not perceive.

  17. Do they wait for aught but its final sequel? On the day when its final sequel comes about, those who neglected it before will say: Indeed the messengers of our Lord brought the truth; are there for us then any intercessors so that they should intercede on our behalf? Or could we be sent back so that we should do (deeds) other than those which we did? Indeed they have lost their souls and that which they forged has gone away from them.

  18. And We divided them into twelve tribes, as nations; and We revealed to Musa when his people asked him for water: Strike the rock with your staff, so outnowed from it twelve springs; each tribe knew its drinking place; and We made the clouds to give shade over them and We sent to them manna and quails: Eat of the good things We have given you. And they did not do Us any harm, but they did injustice to their own souls.

  19. Evil is the likeness of the people who reject Our communications and are unjust to their own souls.

  20. And they have no power to give them help, nor can they help themselves.

  21. And those whom you call upon besides Him are not able to help you, nor can they help themselves.

  22. Had it been a near advantage and a short journey, they would certainly have followed you, but the tedious journey was too long for them; and they swear by Allah: If we had been able, we would certainly have gone forth with you; they cause their own souls to perish, and Allah knows that they are most surely

  23. Let not then their property and their children excite your admiration; Allah only wishes to chastise them with these in this world's life and (that) their souls may depart while they are unbelievers.

  24. Has not the news of those before them come to them; of the people of Nuh and Ad and Samood, and the people of Ibrahim and the dwellers of Madyan and the overthrown cities; their messengers came to them with clear arguments; so it was not Allah Who should do them injustice, but they were unjust to themselves.

  25. And let not their property and their children excite your admlration; Allah only wishes to chastise them with these in this world and (that) their souls may depart while they are unbelievers

  26. Surely Allah has bought of the believers their persons and their property for this, that they shall have the garden; they fight in Allah's way, so they slay and are slain; a promise which is binding on Him in the Taurat and the Injeel and the Quran; and who is more faithful to his covenant than Allah? Rejoice therefore in the pledge which you have made; and that is the mighty achievement.

  27. And to the three who were left behind, until the earth became strait to them notwithstanding its spaciousness and their souls were also straitened to them; and they knew it for certain that there was no refuge from Allah but in Him; then He turned to them (mercifully) that they might turn (to Him); surely Allah is the Oft-returning (to mercy), the Merciful.

  28. Surely Allah does not do any injustice to men, but men are unjust to themselves.

  29. These are they who have lost their souls, and what they forged is gone from them.

  30. And We did not do them injustice, but they were unjust to themselves, so their gods whom they called upon besides Allah did not avail them aught when the decree of your Lord came to pass; and they added but to their ruin.

  31. And you dwell in the abodes of those who were unjust to themselves, and it is clear to you how We dealt with them and We have made (them) examples to you.

  32. They do not wait aught but that the angels should come to them or that the commandment of your Lord should come to pass. Thus did those before them; and Allah was not unjust to them, but they were unjust to themselves.

  33. And for those who were Jews We prohibited what We have related to you already, and We did them no injustice, but they were unjust to themselves.

  34. They will not hear its faintest sound, and they shall abide in that which their souls long for.

  35. And as for him whose good deeds are light, these are they who shall have lost their souls, abiding in hell

  36. And (as for) those who accuse their wives and have no witnesses except themselves, the evidence of one of these (should be taken) four times, bearing Allah to witness that he is most surely of the truthful ones.

  37. And they denied them unjustly and proudly while their soul had been convinced of them; consider, then how was the end of the mischief-makers.

  38. So each We punished for his sin; of them was he on whom We sent down a violent storm, and of them was he whom the rumbling overtook, and of them was he whom We made to be swallowed up by the earth, and of them was he whom We drowned; and it did not beseem Allah that He should be unjust to them, but they were unjust to their own souls.

  39. Have they not travelled in the earth and seen how was the end of those before them? They were stronger than these in prowess, and dug up the earth, and built on it in greater abundance than these have built on it, and there came to them their messengers with clear arguments; so it was not beseeming for Allah that He should deal with them unjustly, but they dealt unjustly with their own souls.

  40. Do they not see that We drive the water to a land having no herbage, then We bring forth thereby seed-produce of which their cattle and they themselves eat; will they not then see?

  41. And they said: O our Lord! make spaces to be longer between our journeys; and they were unjust to themselves so We made them stories and scattered them with an utter scattering; most surely there are signs in this for every patient, grateful one

  42. Serve then what you like besides Him. Say: The losers surely are those who shall have lost themselves and their families on the day of resurrection; now surely that is the clear loss.

  43. And you shall see them brought before it humbling themselves because of the abasements, looking with a faint glance. And those who believe shall say: Surely the losers are they who have lost themselves and their followers on the resurrection day. Now surely the iniquitous shall remain in lasting chastisement.

  44. And be not like those who forsook Allah, so He made them forsake their own souls: these it is that are the transgressors.