וּנְמַלְתֶּ֕ם אֵ֖ת בְּשַׂ֣ר עָרְלַתְכֶ֑ם וְהָיָה֙ לְא֣וֹת בְּרִ֔ית בֵּינִ֖י וּבֵינֵיכֶֽם׃
너희는 양피를 베어라 이것이 나와 너희 사이의 언약의 표징이니라
Akeidat Yitzchak
5) When G-d refers to "when I see it... I will remember," this is strange. Surely He does not require these memory joggers in all His perfection.