Deuteronomy 3:18

16To the Reubenites and to the Gadites I gave from Gilead even to the valley of the Arnon, the middle of the valley, and its border, even to the river Jabbok, which is the border of the children of Ammon;

17the Arabah also, and the Jordan and its border, from Chinnereth even to the sea of the Arabah, the Salt Sea, under the slopes of Pisgah eastward.

18I commanded you at that time, saying, “The LORD your God has given you this land to possess it. All of you men of valor shall pass over armed before your brothers, the children of Israel.

19But your wives, and your little ones, and your livestock, (I know that you have much livestock), shall live in your cities which I have given you,

20until the LORD gives rest to your brothers, as to you, and they also possess the land which the LORD your God gives them beyond the Jordan. Then you shall each return to his own possession, which I have given you.”