Commentaries:
Balak, of course, is furious with Balaam for thrice predicting such a rosy future for Israel. The soothsayer reminds him that he warned him from the start that he "could not go beyond the word of the LORD, to do either good or bad of [his] own will; but what the LORD says, that [he] must speak" (Numbers 24:13). It is difficult to decide which of these two characters is more ludicrous: Balaam, for thinking that God would give in and let him curse Israel—or at least put in a good word for Moab; or Balak, for listening to and putting up with Balaam!
As if trying to mollify his employer, Balaam adds, "Come, I will advise you what this people will do to your people in the latter days" (verse 14), but his words are hardly comforting to the Moabite king.
Richard T. Ritenbaugh
The Prophecies of Balaam (Part Two)