Matthew Henry Commentary Numbers 24:10-14

"And Balak`s anger was kindled against Balaam, and he smote his hands together; and Balak said unto Balaam, I called thee to curse mine enemies, and, behold, thou hast altogether blessed them these three times. Therefore now flee thou to thy place: I thought to promote thee unto great honor; but, lo, Jehovah hath kept thee back from honor. And Balaam said unto Balak, Spake I not also to thy messengers that thou sentest unto me, saying, If Balak would give me his house full of silver and gold, I cannot go beyond the word of Jehovah, to do either good or bad of mine own mind; what Jehovah speaketh, that will I speak? And now, behold, I go unto my people: come, [and] I will advertise thee what this people shall do to thy people in the latter days." — Numbers 24:10-14 (ASV)

This vain attempt to curse Israel is ended. Balak broke out into a rage against Balaam and expressed great vexation. Balaam has a very full excuse: God restrained him from saying what he would have said, and constrained him to say what he would not have uttered.