Numbers 32:26

24Build cities for your little ones, and folds for your sheep; and do that which has proceeded out of your mouth.”

25The children of Gad and the children of Reuben spoke to Moses, saying, “Your servants will do as my lord commands.

26Our little ones, our wives, our flocks, and all our livestock shall be there in the cities of Gilead;

27but your servants will pass over, every man who is armed for war, before the LORD to battle, as my lord says.”

28So Moses commanded concerning them to Eleazar the priest, and to Joshua the son of Nun, and to the heads of the fathers’ households of the tribes of the children of Israel.