Numbers 22:21-24

So Balaam rose in the morning, saddled his donkey, and went with the princes of Moab. Then God’s anger was aroused because he went, and the Angel of the LORD took His stand in the way as an adversary against him. And he was riding on his donkey, and his two servants were with him. Now the donkey saw the Angel of the LORD standing in the way with His drawn sword in His hand, and the donkey turned aside out of the way and went into the field. So Balaam struck the donkey to turn her back onto the road. Then the Angel of the LORD stood in a narrow path between the vineyards, with a wall on this side and a wall on that side.