Numbers 32:20 in the King James Version
And Moses said unto them, If ye will do this thing, if ye will go armed before the LORD to war,
Context
19 For we will not inherit with them on the other side of the Jordan and beyond, because our inheritance has come to us on this side of the Jordan eastward.”
20 Moses said to them: “If you will do this thing, if you will arm yourselves to go before the LORD to the war,
21 and every one of your armed men will pass over the Jordan before the LORD until he has driven out his enemies from before him,