פירוש על שמות 34:24

אוריש means as the Targum has it אתריך, I will drive out. Similar is (Deuteronomy 2:31) “Begin to drive out (רש)”; and similar is, (Numbers 21:32) “and drove out (ויורש) the Amorites” — all having the sense of expelling.

כי אוריש גוים מפניך, "For I will dispossess nations from your presence, etc." In the event that you would feel empathy with the nations whom you displace, G'd assures us that we would not even see the remnants of these nations, i.e. מפניך, "out of the sight of your face."

Therefore I establish for you. . . [Rashi knows this] because otherwise, why does it say, “For I will drive out”? How does this give a reason [for the preceding]?