Numbers 22:19

Balaam had learnt (Numbers 22:12) that Israel was a people on whom God's blessing rested. It was therefore impossible for him to go and curse them. But when Balak's more splendid retinue of princes travelled all the way to Mesopotamia to beg him again to come, he asked God again whether he might go, not to curse but to deliver a divine message whatever it might prove to be. And on his arrival he immediately told Balak that this was the purpose for which he had come (Numbers 22:38).