Charles Ellicott Commentary Numbers 23:21

"He hath not beheld iniquity in Jacob; Neither hath he seen perverseness in Israel: Jehovah his God is with him, And the shout of a king is among them." — Numbers 23:21 (ASV)

He hath not beheld iniquity ... — The same combination of the words aven (iniquity, or injustice) and amal (perverseness, or, rather, suffering or grievance) occurs in Habakkuk 1:3.

The shout of a king.— The word which is rendered shout (teruah) is the same which occurs in Leviticus 23:24, and which is there rendered blowing of trumpets. (Joshua 6:20, where the same word is rendered shout as here.)