Deuteronomy 3:18

“Then I commanded you at that time, saying, ‘The Lord your God has given you this land to possess it; all you valiant men shall cross over armed before your brothers, the sons of Israel.

Joshua 4:12-13

The sons of Reuben and the sons of Gad and the half-tribe of Manasseh crossed over in battle array before the sons of Israel, just as Moses had spoken to them;

Numbers 32:20-24

So Moses said to them, “If you will do this, if you will arm yourselves before the Lord for the war,

Joshua 1:12-15

To the Reubenites and to the Gadites and to the half-tribe of Manasseh, Joshua said,

Joshua 22:1-9

Then Joshua summoned the Reubenites and the Gadites and the half-tribe of Manasseh,

Treasury of Scripture Knowledge

Summary

And I commanded you at that time, saying, The LORD your God hath given you this land to possess it: ye shall pass over armed before your brethren the children of Israel, all that are meet for the war.

General references

Bible References

I commanded

Numbers 32:20
So Moses said to them, “If you will do this, if you will arm yourselves before the Lord for the war,
Joshua 1:12
To the Reubenites and to the Gadites and to the half-tribe of Manasseh, Joshua said,
Joshua 4:12
The sons of Reuben and the sons of Gad and the half-tribe of Manasseh crossed over in battle array before the sons of Israel, just as Moses had spoken to them;
Joshua 22:1
Then Joshua summoned the Reubenites and the Gadites and the half-tribe of Manasseh,

General references

Numbers 32:17
but we ourselves will be armed ready to go before the sons of Israel, until we have brought them to their place, while our little ones live in the fortified cities because of the inhabitants of the land.