Matthew Poole and continuators on Numbers 22:20

20 And God came unto Balaam at night, and said unto him, if the men come to call thee, rise up and go with them : but yet the word which I shall say unto thee, that shalt thou do .

Since this is thy great desire, and purpose, as far as thou canst, take thy course, I will, according to thy wish, withdraw my restraint, and leave thee to thy self and thy own choice. Compare Psal. 81. 11, 12.

These words signifie not so much his duty, as the event and his disappointment, Thou shalt not do what thou desirest, to wit. curse my people and so inrich and advance thy self, but I will so over-rule thy mind and bridle thy tongue that thou shalt speak nothing but what is contrary to thy desire and interest, and therefore though I permit thee to go, thou shalt lose thy design in it.