'Unsheathed' in the Bible

all of a sudden the donkey saw the angel of the LORD standing in the way, with an unsheathed sword in his hand! The donkey turned off the road and went into an open field. Balaam started beating the donkey in order to turn her back to the road,

Then the LORD enabled Balaam to see, so he observed the angel of the LORD standing in the way, with an unsheathed sword in his hand. So he bowed down and prostrated himself on his face.