Numbers 4:29-31

Darby Translation

²⁹ The sons of Merari: after their families, according to their fathers' houses shalt thou number them;

³⁰ from thirty years old and upward even to fifty years old shalt thou number them, every one that entereth into the labour, to perform the service of the tent of meeting.

³¹ And this shall be the charge of their burden, according to all their service in the tent of meeting: the boards of the tabernacle, and the bars thereof, and the pillars thereof, and bases thereof,