Genesis 22:10

⁸  And Abraham said, My son, God will provide himself a lamb for a burnt offering: so they went both of them together.

⁹  And they came to the place which God had told him of; and 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.

¹⁰  And Abraham stretched forth his hand, and took the knife to slay his son.

¹¹  And the angel of the LORD called unto him out of heaven, and said, Abraham, Abraham: and he said, Here am I.

¹²  And he said, Lay not thine hand upon the lad, neither do thou any thing unto him: for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son from me.