Genesis 22:6-8

And Abraham took the wood of the burnt-offering, and laid it upon Isaac his son; and he took in his hand the fire and the knife; and they went both of them together. And Isaac spake unto 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? And Abraham said, God will provide himself the lamb for a burnt-offering, my son: so they went both of them together.