O you who believe! when you go to war in Allah's way, make investigation, and do not say to any one who offers you peace: You are not a believer. Do you seek goods of this world's life! But with Allah there are abundant gains; you too were such before, then Allah conferred a benefit on you; therefore make investigation; surely Allah is aware of what you do.

And saying: Cast down you staff. So when he saw it in motion as if it were a serpent, he turned back retreating, and did not return. O Musa! come forward and fear not; surely you are of those who are secure;