Numbers 31:5

31:5 So a thousand from every tribe, twelve thousand armed for battle in all, were provided out of the thousands of Israel.

Numbers 32:21

32:21 and if all your armed men cross the Jordan before the Lord until he drives out his enemies from his presence

32:27 but your servants will cross over, every man armed for war, to do battle in the Lord’s presence, just as my lord says.”