Numbers 4:29-31

New Revised Standard Version, Anglicised

²⁹ As for the Merarites, you shall enrol them by their clans and their ancestral houses; ³⁰ from thirty years old up to fifty years old you shall enrol them, everyone who qualifies to do the work of the tent of meeting. ³¹ This is what they are charged to carry, as the whole of their service in the tent of meeting: the frames of the tabernacle, with its bars, pillars, and bases,