Commentary for Deuteronomy 23:6

ולא אבה ה׳ אלוקיך לשמוע אל בלעם, "but the Lord your G'd refused to listen to Bileam, etc." Although G'd could have found a reason for allowing Bileam to curse the Israelites seeing they were guilty of sins, He decided not to allow him to do so and to extend His goodwill to the Israelites even though they could not claim it by right. The Torah adds כי אהבך, "because G'd loves you," i.e. not because of your merit. Please read what I wrote on the meaning of לא אבה on Deut. 2,30.