'Robes' in the Bible

The king of Israel and Jehoshaphat king of Judah [were] each sitting on his throne, dressed [in their] robes, at the threshing floor at the entrance of the gate of Samaria, [with] all the prophets prophesying before them.

Then the king of Israel said to Jehoshaphat, "[I will] disguise myself and go into the battle, but you wear your robes." So the king of Israel disguised himself, and he went into the battle.