Numbers 32:21

All your fighting men are to cross the Jordan and under Jehovah's command they are to attack our enemies until Jehovah defeats them

Treasury of Scripture Knowledge

Summary

And will go all of you armed over Jordan before the LORD, until he hath driven out his enemies from before him,

General references

Bible References

General references

Numbers 32:29
Make sure the tribes of Gad and Reuben prepare for battle and cross the Jordan River with you. If they do, then after the land is in your control, give them the region of Gilead as their tribal land.