Numbers 22:22-27

But God was angry that Balaam was going, so he sent the angel of the LORD to stand in the road to block his way. As Balaam and two servants were riding along, Balaam’s donkey saw the angel of the LORD standing in the road with a drawn sword in his hand. The donkey bolted off the road into a field, but Balaam beat it and turned it back onto the road. Then the angel of the LORD stood at a place where the road narrowed between two vineyard walls. When the donkey saw the angel of the LORD, it tried to squeeze by and crushed Balaam’s foot against the wall. So Balaam beat the donkey again. Then the angel of the LORD moved farther down the road and stood in a place too narrow for the donkey to get by at all. This time when the donkey saw the angel, it lay down under Balaam. In a fit of rage Balaam beat the animal again with his staff.