Rashi on Genesis 12:6/רש"י על בראשית י״ב:ו׳

1ויעבר אברם בארץ AND ABRAHAM PASSED THROUGH THE LAND —he entered it.

2עד מקום שכם UNTO THE PLACE OF SHECHEM — In order to pray on behalf of Jacob’s sons, anticipating the time when they would come to fight against Shechem.

3אלון מורה THE PLAIN OF MOREH — This is Shechem (Sotah 32a). He showed him Mount Gerizim and Mount Ebal where Israel took upon themselves the oath to observe the Torah (cf. Deuteronomy 11:29 and Deuteronomy 111:30).

4והכנעני אז בארץ AND THE CANAANITE WAS THEN IN THE LAND — They (the Canaanites) were gradually conquering the land of Israel from the descendants of Shem, for it had fallen to the share of Shem when Noah apportioned the earth amongst his sons, for it is said (Genesis 14:18) “And Melchizedek) king of Salem (Jerusalem)”. For this reason the Lord said to Abram (Genesis 12:7) “to thy seed will I give this land” — “I will in some future time return it to thy children who are descendants of Shem”.