Deuteronomy 4:41

Moses set aside three cities on the east side of the Jordan.

Numbers 35:6

Six of the cities you give the Levites will be cities of refuge. You must allow murderers to escape to these cities. In addition, you must also give the Levites forty-two other cities.

Numbers 35:14-15

Three will be on the east side of the Jordan River and three in Canaan.

Joshua 20:2-9

Speak to the children of Israel and say: Designate cities of refuge just as Moses directed.

Treasury of Scripture Knowledge

Summary

Then Moses severed three cities on this side Jordan toward the sunrising;

General references

Bible References

General references

Numbers 35:6
Six of the cities you give the Levites will be cities of refuge. You must allow murderers to escape to these cities. In addition, you must also give the Levites forty-two other cities.
Joshua 20:2
Speak to the children of Israel and say: Designate cities of refuge just as Moses directed.