Numbers:22:22-23
rsv@Numbers:22:22 @ But God's anger was kindled because he went; and the angel of the LORD took his stand in the way as his adversary. Now he was riding on the ass, and his two servants were with him.
rsv@Numbers:22:23 @ And the ass saw the angel of the LORD standing in the road, with a drawn sword in his hand; and the ass turned aside out of the road, and went into the field; and Balaam struck the ass, to turn her into the road.