Numbers 4:39-41

Revised Standard Version

³⁹ from thirty years old up to fifty years old, every one that could enter the service for work in the tent of meeting— ⁴⁰ their number by their families and their fathers’ houses was two thousand six hundred and thirty. ⁴¹ This was the number of the families of the sons of Gershon, all who served in the tent of meeting, whom Moses and Aaron numbered according to the commandment of the Lord.