We must not suppose that the LORD asked Balaam, from an ignorance of which had passed, wherefore these men were come: but the subject of the discourse is thus carried on. Moreover, it should seem from what follows, that Balaam was temporizing, as it were, with GOD in order to gratify Balak! He longed, as all bad men like himself have always done, to curse the LORD'S people. See David's account of this: Psalms 109:28.
Related Commentaries of Numbers 22:10
Numbers 22:10-11
10 And Balaam said unto God, Balak the son of Zippor, king of Moab, hath sent unto me, saying,
11 Behold, there is a people come out of Egypt, which covereth the face of the earth: come now, curse me them; peradventure I shall be able to overcome them, and drive them out.