וַהֲקִמֹתִ֨י אֶת־בְּרִיתִ֜י בֵּינִ֣י וּבֵינֶ֗ךָ וּבֵ֨ין זַרְעֲךָ֧ אַחֲרֶ֛יךָ לְדֹרֹתָ֖ם לִבְרִ֣ית עוֹלָ֑ם לִהְי֤וֹת לְךָ֙ לֵֽאלֹהִ֔ים וּֽלְזַרְעֲךָ֖ אַחֲרֶֽיךָ׃
내가 내 언약을 나와 너와 네 대대 후손의 사이에 세워서 영원한 언약을 삼고 너와 네 후손의 하나님이 되리라
Rashi on Genesis
והקמתי את בריתי AND I WILL ESTABLISH MY COVENANT — And what is this Covenant? להיות לך לאלהים TO BE A GOD UNTO THEE.
Radak on Genesis
והקימותי את בריתי ... ובין זרעך אחריך, G'd refers to promised made both to Yaakov and to his descendants as spelled out in Leviticus 26,12. The reciprocal relationship between the Jewish people and G'd is spelled out there clearly.
Sforno on Genesis
להיות לך לאלוקים ולזרעך אחריך, to accept Me as your exclusive deity, without any intermediary, just as G'd is the sold G'd of all the enduring phenomena in the world (the planets, stars, etc.) Solomon phrased it thus in Kohelet 3,14: כי כל אשר יעשה האלוקים הוא יהיה לעולם. According to our author this verse proves that anything which G'd has created without intermediary is eternal, endures, whereas when we see creatures and other phenomena disintegrate, this is proof that they were brought into existence by intermediaries of G'd, by His agents, not by Himself. Observing the terms of this covenant was concluded with G'd directly, not with an intermediary