And when Ibrahim said: My Lord! show me how Thou givest life to the dead, He said: What! and do you not believe? He said: Yes, but that my heart may be at ease. He said: Then take four of the birds, then train them to follow you, then place on every mountain a part of them, then call them, they will come to you flying; and know that Allah is Mighty, Wise.

(These are) they whose labor is lost in this world's life and they think that they are well versed in skill of the work of hands.

So he cast it down; and lo! it was a serpent running.