Here is a blog post that breaks down the Rogatchover Gaon's interpretation of the verse (Bereshit 22:6):

ו וַיִּקַּח אַבְרָהָם אֶת-עֲצֵי הָעֹלָה, וַיָּשֶׂם עַל-יִצְחָק בְּנוֹ, וַיִּקַּח בְּיָדוֹ, אֶת-הָאֵשׁ וְאֶת-הַמַּאֲכֶלֶת; וַיֵּלְכוּ שְׁנֵיהֶם, יַחְדָּו.

 

6 And Abraham took the wood of the burnt-offering, and laid it upon Isaac his son; and he took in his hand the fire and the knife; and they went both of them together.

The Rogatchover asks why Avraham only put the wood on Yitzchak, and not the knife. He explains that it is forbidden to use the Korban to carry the knife. Since the wood was specifically for the sacrifice, it was permitted for Yitzchak to carry it.

See the blog post for more information and specifics.

Here is a blog post that breaks down the Rogatchover Gaon's interpretation of the verse (Bereshit 22:6):

ו וַיִּקַּח אַבְרָהָם אֶת-עֲצֵי הָעֹלָה, וַיָּשֶׂם עַל-יִצְחָק בְּנוֹ, וַיִּקַּח בְּיָדוֹ, אֶת-הָאֵשׁ וְאֶת-הַמַּאֲכֶלֶת; וַיֵּלְכוּ שְׁנֵיהֶם, יַחְדָּו.

6 And Abraham took the wood of the burnt-offering, and laid it upon Isaac his son; and he took in his hand the fire and the knife; and they went both of them together.

The Rogatchover asks why Avraham only put the wood on Yitzchak, and not the knife. He explains that it is forbidden to use the Korban to carry the knife. Since the wood was specifically for the sacrifice, it was permitted for Yitzchak to carry it.

See the blog post for more information and specifics.