פירוש על בראשית 13:14

אחרי הפרד לוט AFTER LOT WAS SEPARATED FROM HIM — So long as the wicked (Lot) was with him the word of God kept away from him (i. e. God had no communion with Abraham) (Midrash Tanchuma, Vayetzei 10).

אחרי הפרד לוט, G’d did not say what follows while Lot was still in Avram’s company, so that the latter would not boast and his shepherds would engage in stealing grazing land from the local inhabitants claiming G’d’s promise to Avram of future possession as their justification.

וה׳ אמר אל אברם. G'd said to Abram. The form of address is unusual. We would have expected ויאמר השם "now G'd said to Abraham, etc." The reason for the form of address chosen by the Torah maybe that the Torah wanted to give us a hint that G'd had already waited a long time to tell Abraham what He now told him, but that as long as the wicked Lot was part of his entourage He could not do so. G'd now fulfilled the second part of what He had said to Abraham in 12,1 i.e. אל הארץ אשר אראך.