10 Then Joshua gave their orders to those who were in authority over the people, saying, 11 Go through the tents and give orders to the people, saying, Get ready a store of food; for in three days you are to go over this river Jordan and take for your heritage the land which the Lord your God is giving you. 12 And to the Reubenites and the Gadites and the half-tribe of Manasseh, Joshua said, 13 Keep in mind what Moses, the servant of the Lord, said to you, The Lord your God is sending you rest and will give you this land. 14 Your wives, your little ones, and your cattle will be kept here in the land which Moses gave you on this side of Jordan; but you, the fighting-men, are to go over before your brothers, armed, to give them help; 15 Till the Lord has given your brothers rest, as he has given it to you, and they have taken their heritage in the land which the Lord your God is giving them: then you will go back to the land of your heritage which Moses, the servant of the Lord, gave you on the east side of Jordan.

Matthew Henry's Commentary on Joshua 1:10-15

Commentary on Joshua 1:10-15

(Read Joshua 1:10-15)

Joshua says to the people, Ye shall pass over Jordan, and shall possess the land; because God had said so to him. We honour the truth of God, when we stagger not at the promise of God. The two tribes and a half were to go over Jordan with their brethren. When God, by his providence, has given us rest, we ought to consider what service we may do to our brethren.