Genesis 22:11-12

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

and He saith, `Put not forth thine hand unto the youth, nor do anything to him, for now I have known that thou art fearing God, and hast not withheld thy son, thine only one, from Me.'