Genesis 22:6-8

Abraham took the wood of the burnt offering and laid it on Isaac his son, and he took in his hand the fire and the knife. So the two of them walked on together. Isaac spoke to Abraham his father and said, “My father!” And he said, “Here I am, my son.” And he said, “Behold, the fire and the wood, but where is the lamb for the burnt offering?” Abraham said, “God will provide for Himself the lamb for the burnt offering, my son.” So the two of them walked on together.