וַיֹּ֨אמֶר אֵלָ֜יו בָּלָ֗ק לך־[לְכָה־] נָּ֨א אִתִּ֜י אֶל־מָק֤וֹם אַחֵר֙ אֲשֶׁ֣ר תִּרְאֶ֣נּוּ מִשָּׁ֔ם אֶ֚פֶס קָצֵ֣הוּ תִרְאֶ֔ה וְכֻלּ֖וֹ לֹ֣א תִרְאֶ֑ה וְקָבְנוֹ־לִ֖י מִשָּֽׁם׃
Sinabi sa kanya ni Balak: “Halika, pakiusap, sumama ka sa akin sa ibang lugar na kung saan makikita mo sila mula roon; ang dulo lamang nila ang makikita mo, at hindi mo makikita silang lahat; at sumpain mo sila para sa akin mula roon.”
Rashi
וקבנו לי — The verb is the imperative: CURSE THEM FOR ME (cf. Rashi on v. 27).
Sforno
אשר תראנו משם, so that you can focus on them with your evil eye.
Or HaChaim
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.