Joshua 1:10-14

Then Joshua gave an order to those in charge of the people:

“Go through the whole camp and tell the people, ‘Get everything ready, because in three days time we will cross the Jordan, to go and take the land God is giving to you to possess.’”

But to the tribes of Reuben and Gad, and half of the tribe of Manasseh, Joshua said,

“Remember what Moses, the servant of the Lord, ordered you to do: ‘The Lord your God is giving you rest, and will give you this land.’

Your wives and children, and your livestock will remain here in the land that Moses allotted you on the east side of the Jordan. But all your armed men, ready for battle, will cross over ahead of your brothers to help them,