Numbers 22:21

18 But Balaam answered them, “Even if Balak gave me all the silver and gold in his palace, I could not do anything great or small to go beyond the command of the Lord my God. 19 Now spend the night here so that I can find out what else the Lord will tell me.”

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

21 Balaam got up in the morning, saddled his donkey and went with the Moabite officials. 22 But God was very angry when he went, and the angel of the Lord stood in the road to oppose him. Balaam was riding on his donkey, and his two servants were with him. 23 When the donkey saw the angel of the Lord standing in the road with a drawn sword in his hand, it turned off the road into a field. Balaam beat it to get it back on the road. 24 Then the angel of the Lord stood in a narrow path through the vineyards, with walls on both sides.