Rashi on Numbers 24:1/רש"י על במדבר כ״ד:א׳

1וירא בלעם כי טוב וגו׳ AND BALAAM SAW THAT IT WAS GOOD, etc. He said: I do not need to put the Holy One, blessed be He, to a further test for it is evident that He does not wish to curse them.

2ולא הלך כפעם בפעם HE WENT NOT, AS AT OTHER TIMES — as he had already done twice.

3לקראת נחשים TO SEEK SEEK FOR ENCHANTMENTS — to practise enchantments whereby the Lord might perhaps come to meet him according to his (Balaam’s) wish. He said: Whether He wishes or does not wish to curse them, I will make mention of their sins, and the curse will fall upon them at the mention of their sins, therefore —

4וישת אל המדבר פניו HE SET HIS FACE TOWARDS THE WILDERNESS — Understand this as the Targum has it (Rashi’s Targum read, as in some editions: He directed his face towards the calf that the children of Israel had made in the wilderness).