Genesis 22:5-8

5And Abraham said to his young men, Abide ye here with the donkey; and I and the lad will go yonder and worship, and return to you. 6And Abraham took the wood of the burnt offering, and laid it upon Isaac his son; and he took the fire in his hand, and a knife; and they went both of them together. 7And Isaac spoke to Abraham his father, and said, My father: and he said, Here am I, my son. And he said, Behold the fire and the wood: but where is the lamb for a burnt offering?1 8And Abraham said, My son, God will provide himself a lamb for a burnt offering: so they went both of them together.