Numbers 22:21-23

Balaam got up the next morning and put a saddle on his donkey. Then he went with the Moabite leaders. But God became angry because Balaam went, so the angel of the LORD stood in the road to stop Balaam. Balaam was riding his donkey, and he had two servants with him. When the donkey saw the angel of the LORD standing in the road with a sword in his hand, the donkey left the road and went into the field. Balaam hit the donkey to force her back on the road.