Numbers 4:43-45

International Standard Version

⁴³ from 30 to 50 years old; that is, everyone who entered the service to perform work at the Tent of Meeting. ⁴⁴ The total according to their tribes numbered 3,200 ⁴⁵ from the tribes of the descendants of Merari, whom Moses and Aaron numbered according to what the Lord had said, under the supervision of Moses.