Numbers 32:17

We ourselves will go Either all, or as many of us as shall be thought necessary, leaving only so many as may be requisite to provide for the support and defence of our wives and children. Because of the inhabitants of the land The Moabites and Edomites, or other neighbouring people, together with such of the Amorites as had saved themselves by flight, and would watch all opportunities of seeking to reinstate themselves in their lost possessions. Accordingly we find that forty thousand of the Reubenites and Gadites went over with their brethren, ready armed for war, to the plains of Jericho, Deuteronomy 3:18; Joshua 4:12.