'Sash' in the Bible

Joab asked the man who was reporting to him, "What! You saw him? Why didn't you kill him right then and there? I would've given you ten pieces of silver and a warrior's sash!"

When they were at the great stone which is in Gibeon, Amasa came to meet them. Joab was clothed in his apparel of war that he had put on, and on it was a sash with a sword fastened on his waist in its sheath; and as he went forth it fell out.