Numbers 32:25-27

32:25 So the Gadites and the Reubenites replied to Moses, “Your servants will do as my lord commands. 32:26 Our children, our wives, our flocks, and all our livestock will be there in the cities of Gilead, 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.”