ליטעראַטור פֿון בית שני אויף בראשית 22:1

[195] For when he was at the beginning we are told “God did prove Abraham, and said unto him, ‘Abraham, Abraham’; and he said ‘Here am I.’ And He said, ‘Take thy beloved son, whom thou lovedst, even Isaac, and offer him up.’ ” And when he had now brought the victim to the altar, then “an angel of the Lord called to him out of heaven, saying ‘Abraham, Abraham.’ And he said, ‘Here am I.’ And he said, ‘Lay not thine hand upon the lad, neither do thou anything unto him’ ” (Gen. 22:1, 2, 9–12).