Numbers 32:20 KJV

And Moses said unto them, If ye will do this thing, if ye will go armed before the Lord to war,
Numbers 32:20, King James Version

In context

19 For we will not inherit with them on yonder side Jordan, or forward; because our inheritance is fallen to us on this side Jordan eastward.

20 And Moses said unto them, If ye will do this thing, if ye will go armed before the Lord to war,

21 And will go all of you armed over Jordan before the Lord, until he hath driven out his enemies from before him,