as he went forth it fell out. and it (the sword) dropped out, and fell.
Related Commentaries of 2 Samuel 20:8
2 Samuel 20:8
8 When they were at the great stone which is in Gibeon, Amasa went before them. And Joab's garment that he had put on was girded unto him, and upon it a girdle with a sword fastened upon his loins in the sheath thereof; and as he went forth it fell out.