Genesis 22:9-11

Young's Literal Translation

⁹ And they come in unto the place of which God hath spoken to him, and there Abraham buildeth the altar, and arrangeth the wood, and bindeth Isaac his son, and placeth him upon the altar above the wood;

¹⁰ and Abraham putteth forth his hand, and taketh the knife -- to slaughter his son.

¹¹ And the messenger of Jehovah calleth unto him from the heavens, and saith, `Abraham, Abraham;' and he saith, `Here [am] I;'