Numbers 22:18-20

18But Balaam responded to the servants of Balak, “If Balak were to give me his house full of silver and gold, I could not go against the command of the Lord my God to do anything small or great.

19Please stay here overnight as the others did, so that I may find out what else the Lord has to tell me.”

20God came to Balaam at night and said to him, “Since these men have come to summon you, get up and go with them, but you must only do what I tell you.”