Yitzchak's soul left him and then returned at the altar
At the moment the blade touched his neck, Yitzchak's soul departed from him, but when the Divine voice called out from between the Keruvim (Cherubim) commanding Avraham to withhold his hand, his soul was restored and he rose to his feet alive. Through this experience Yitzchak perceived, in his own flesh, the future resurrection of the dead, and he responded by blessing G-d as the One who revives the dead.AI summary · anthropic/claude-haiku-5.5
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.
רַבִּי יְהוּדָה אוֹמֵר: כֵּיוָן שֶׁהִגִּיעַ הַחֶרֶב עַל צַוָּארוֹ, פָּרְחָה וְיָצְאָה נַפְשׁוֹ שֶׁל יִצְחָק. וְכֵיוָן שֶׁהִשְׁמִיעַ קוֹלוֹ מִבֵּין הַכְּרוּבִים וְאָמַר לוֹ ״אַל תִּשְׁלַח יָדְךָ״, נַפְשׁוֹ חָזְרָה לְגוּפוֹ, וְקָם וְעָמַד יִצְחָק עַל רַגְלָיו. וְיָדַע יִצְחָק שֶׁכָּךְ הַמֵּתִים עֲתִידִים לְהֵחָיוֹת, וּפָתַח וְאָמַר: ״בָּרוּךְ אַתָּה ה' מְחַיֵּה הַמֵּתִים״.