Genesis 22:7-9

New Revised Standard Version Catholic Edition

⁷ Isaac said to his father Abraham, “Father!” And he said, “Here I am, my son.” He said, “The fire and the wood are here, but where is the lamb for a burnt offering?” ⁸ Abraham said, “God himself will provide the lamb for a burnt offering, my son.” So the two of them walked on together.

⁹ When they came to the place that God had shown him, Abraham built an altar there and laid the wood in order. He bound his son Isaac, and laid him on the altar, on top of the wood.