Genesis 22:6-8

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