Numbers 23:8

"How shall I curse, whom God hath not cursed? or how shall I defy, whom the LORD hath not defied?"

Cross References (ranked by relevance)

Surely there is no enchantment against Jacob, neither is there any divination against Israel: according to this time it shall be said of Jacob and of Israel, What hath God wrought!

Numbers 23:20

Behold, I have received commandment to bless: and he hath blessed; and I cannot reverse it.

Isaiah 44:25

That frustrateth the tokens of the liars, and maketh diviners mad; that turneth wise men backward, and maketh their knowledge foolish;

Numbers 22:12

And God said unto Balaam, Thou shalt not go with them; thou shalt not curse the people: for they are blessed.