Rashi on Numbers 22:11/רש"י על במדבר כ״ב:י״א

1קבה לי CURSE FOR ME — this is worse than ארה לי, (the expression which Balak had actually used, v. 6), for in the case of this verb it means that one mentions and pronounces in full [the name of God] when cursing (cf. Rashi on Leviticus 24:16) (Midrash Tanchuma, Balak 5).

2וגרשתיו AND I WILL DRIVE THEM OUT, meaning from the world; but Balak had said only, (v. 6) “and I will drive them out from the land”: I seek only to make them move away from me. Balaam, however, hated them even more than did Balak (cf.Midrash Tanchuma, Balak 5).