Genesis 22:6-11

6Abraham took the wood for the burnt offering and placed it on his son Isaac, and he himself carried the fire and the knife. As the two of them went on together,

7Isaac spoke up and said to his father Abraham, “Father?” “Yes, my son?” Abraham replied. “The fire and wood are here,” Isaac said, “but where is the lamb for the burnt offering?”

8Abraham answered, “God himself will provide the lamb for the burnt offering, my son.” And the two of them went on together. 9When they reached the place God had told him about, Abraham built an altar there and arranged the wood on it. He bound his son Isaac and laid him on the altar, on top of the wood. 10Then he reached out his hand and took the knife to slay his son.

11But the angel of the LORD called out to him from heaven, “Abraham! Abraham!” “Here I am,” he replied.