NET
16 For Joab and the entire Israelite army stayed there six months until they had exterminated every male in Edom.
Darby
16 (for Joab abode there six months with all Israel, until he had cut off every male in Edom),
KJV
16 (For six months did Joab remain there with all Israel, until he had cut off every male in Edom:)