Deuteronomy 3:18-22 - Instructions To The Transjordanian Tribes
18 "And I charged you [all] at that time [when I] said, "Yahweh has given you--to [all of] you--this land to possess. All the {warriors} shall cross over, ready to fight, before your brothers, the {Israelites}. 19 Only your wives and your little children and your livestock (I know that {you have much livestock}) must stay in your towns that I have given you, 20 until Yahweh shall give rest to your brothers as [he did] to you, and also they take possession [of] the land that Yahweh your God [is] giving to them beyond the Jordan; then they may return, each [one] to his possession that I have given to them.
21 And I commanded Joshua at that time, saying, 'Your eyes see all that Yahweh your God has done to these two kings; so Yahweh will do to all [of] the kingdoms where you are about to cross over to. 22 You shall not fear them, for Yahweh your God is the [one] fighting for you.