Rabbi Jehudah said: When the blade touched his neck, the soul of Isaac fled and departed, (but) when he heard His voice from between the two Cherubim, saying (to Abraham), "Lay not thine hand upon the lad" (Gen. 22:12), his soul returned to his body, and (Abraham) set him free, and Isaac stood upon his feet. And Isaac knew that in this manner the dead in the future will be quickened. He opened (his mouth), and said: Blessed art thou, O Lord, who quickeneth the dead.
Rabbi Zechariah said: That ram, which was created at the twilight, ran and came to be offered up instead of Isaac, but Sammael was standing by, and distracting it, in order to annul the offering of our father Abraham. And it was caught by its two horns in the trees, as it is said, "And Abraham lifted up his eyes, and looked, and behold, behind him a ram caught in the thicket by its horns" (Gen. 22:13). What did that ram do? It put forth its leg and took hold of the coat of our father Abraham, and Abraham looked, saw the ram, and he went and set it free. He offered it up instead of Isaac his son, as it is said, "And Abraham went and took the ram, and offered it up for a burnt offering in the stead of his son" (ibid.).