Appears 10 times in the Quran. (Root: ضلل)
  1. Surely Allah is not ashamed to set forth any parable-- (that of) a gnat or any thing above that; then as for those who believe, they know that it is the truth from their Lord, and as for those who disbelieve, they say: What is it that Allah means by this parable: He causes many to err by it and many He leads aright by it! but He does not cause to err by it (any) except the transgressors,

  2. And those who disbelieve say: Why is not a sign sent down upon him by his Lord? Say: Surely Allah makes him who will go astray, and guides to Himself those who turn (to Him).

  3. And We did not send any messenger but with the language of his people, so that he might explain to them clearly; then Allah makes whom He pleases err and He guides whom He pleases and He is the Mighty, the Wise.

  4. Allah confirms those who believe with the sure word in this world's life and in the hereafter, and Allah causes the unjust to go astray, and Allah does what He pleases.

  5. If you desire for their guidance, yet surely Allah does not guide him who leads astray, nor shall they have any helpers.

  6. And if Allah please He would certainly make you a single nation, but He causes to err whom He pleases and guides whom He pleases; and most certainly you will be questioned as to what you did.

  7. What! is he whose evil deed is made fairseeming to him so much so that he considers it good? Now surely Allah makes err whom He pleases and guides aright whom He pleases, so let not your soul waste away in grief for them; surely Allah is Cognizant of what they do

  8. And certainly Yusuf came to you before with clear arguments, but you ever remained in doubt as to what he brought; until when he died, you said: Allah will never raise a messenger after him. Thus does Allah cause him to err who is extravagant, a doubter

  9. Besides Allah? They shall say: They are gone away from us, nay, we used not to call upon anything before. Thus does Allah confound the unbelievers.

  10. And We have not made the wardens of the fire others than angels, and We have not made their number but as a trial for those who disbelieve, that those who have been given the book may be certain and those who believe may increase in faith, and those who have been given the book and the believers may not doubt, and that those in whose hearts is a disease and the unbelievers may say: What does Allah mean by this parable? Thus does Allah make err whom He pleases, and He guides whom He pleases, and none knows the hosts of your Lord but He Himself; and this is naught but a reminder to the mortals.