Comentario sobre Números 23:13

וקבנו לי — The verb is the imperative: CURSE THEM FOR ME (cf. Rashi on v. 27).

אשר תראנו משם, so that you can focus on them with your evil eye.

ויאמר אליו בלק לך נא אתי, Balak said to him: "please come with me, etc." On the one hand, Balak pleaded, i.e. נא; on the other hand he was authoritative as evident from the command וקבנו לי משם, "and curse for me from there!" We can understand this apparently contradictory behaviour by Balak in terms of what is written in Tanchuma 13 that Balak showed Bileam the place where Israel would become ordinary, i.e. after Moses would die there. Balak did not know what caused Israel to be נפרץ, to suffer such a breach. He thought this presaged sinfulness by Israel, but he did not realise that Israel would immediately repent its conduct which would cancel G'd's decrees against them. The word נא was a plea for Bileam to be quick and to seize the moment G'd would be angry in order to curse the Israelites. Balak wanted Bileam to even express the most powerful curse possible, קבה, while G'd would be angry with them.