And 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 they went both of them together. And Isaac said to his father Abraham, “My father!” And he said, “Here am I, my son.” He said, “Behold, the fire and the wood; but where is the lamb for a burnt offering?” Abraham said, “God will provide himself the lamb for a burnt offering, my son.” So they went both of them together. When they came to the place of which God had told him, Abraham built an altar there, and laid the wood in order, and bound Isaac his son, and laid him on the altar, upon the wood. Then Abraham put forth his hand, and took the knife to slay his son. But the angel of the LORD called to him from heaven, and said, “Abraham, Abraham!” And he said, “Here am I.” He said, “Do not lay your hand on the lad or do anything to him; for now I know that you fear God, seeing you have not withheld your son, your only son, from me.”
–Genesis 22:6-12