פירוש על בראשית 17:8

לאחזת עולם FOR AN EVERLASTING POSSESSION — and there I will be your God; but whoever resides outside the land is as if he has no God (Ketubot 110b).

ונתתי ... את ארץ מגורך, a reference to the locations in which Avraham had dwelled, not only these but the whole of the land of Canaan.

לאחוזת עולם, "I will be your G'd in order that you may carry out My will, and He gave them the land presently belonging to other nations in order that they keep His statutes." (Psalms 105, 44-45) When they do this they will achieve eternal existence individually, not merely as a species.