Genesis 22:6-8

6Abraham took the wood for the burnt offering and laid it on his son Isaac. In his hand he took the fire and the knife, and the two of them walked on together.

7Then Isaac spoke to his father Abraham and said, “My father.” And he replied, “Here I am, my son.” Isaac said, “The fire and the wood are here, but where is the lamb for the burnt offering?”

8Abraham answered, “God himself will provide the lamb for the burnt offering, my son.” Then the two of them walked on together.