التكوين 22:8

יראה לו השה — this means as much as: He will look out for and choose a lamb for Himself, and if there will be no lamb for a burnt offering, then, בני MY SON will be the offering. Although Isaac then understood that he was travelling on to be slain, yet. וילכו שניהם יחדיו THEY WENT BOTH OF THEM TOGETHER — with the same ready heart (Genesis Rabbah 56:4).

And Avraham said, My son, God will provide himself a lamb for a burnt offering: so they went both of them together.

וַיֹּ֙אמֶר֙ אַבְרָהָ֔ם אֱלֹהִ֞ים יִרְאֶה־לּ֥וֹ הַשֶּׂ֛ה לְעֹלָ֖ה בְּנִ֑י וַיֵּלְכ֥וּ שְׁנֵיהֶ֖ם יַחְדָּֽו׃