Numbers 24:10

“And Balak’s anger was kindled against Balaam, etc.] He had bore much and long, but he could bear no longer, he was quite impatient, his last words more especially must exceedingly nettle him: and he smote his hands together; as expressive of his indignation, vexation, and disappointment: and Balak said unto Balaam, I called thee to curse my enemies; he had sent princes to him, one set of them after another, to invite him into his country, and to his court, with great promises of reward to curse Israel, whom he reckoned his enemies, and not to bless them: and, behold, thou hast altogether blessed them these three times; done nothing else but bless them with blessing upon blessing, time after…”

“Balak's anger was kindled against Balaam, and he smote his hands together--The "smiting of the hands together" is, among Oriental people, an indication of the most violent rage (see Eze 21:17; Eze 22:13) and ignominious dismissal.”

“24:10 Balak clapped his hands in reproach (cp. Job 27:23; Lam 2:15).”

“he smote: Job 27:23; Eze 21:14, Eze 21:17, Eze 22:13 I called: Num 22:6, Num 22:11, Num 22:17, Num 23:11; Deu 23:4, Deu 23:5; Jos 24:9, Jos 24:10; Neh 13:2 Numbers 24:11”

“This repeated blessing of Israel threw Balak into such a violent rage, that he smote his hands together, and advised Balaam to fly to his house: adding, "I said, I will honour thee greatly (cf. Num 22:17 and Num 22:37); but, behold, Jehovah has kept thee back from honour." "Smiting the hands together" was either a sign of horror ( Lam 2:15) or of violent rage; it is in the latter sense that it occurs both here and in Job 27:23. In the words, "Jehovah hath kept thee back from honour," the irony with which Balak scoffs at Balaam's confidence in Jehovah is unmistakeable. Numbers 24:12”