Numbers 4:39

New English Translation

from thirty years old and upward to fifty years old, everyone who entered the company for the work in the tent of meeting –

See the chapter Copy

from thirty years old and upward to fifty years old, everyone who entered the company for the work in the tent of meeting;

Those numbered from the Gershonites, by their families and by their clans,

those of them numbered by their families, by their clans, were 2,630.

So Jesus, when he began his ministry, was about thirty years old. He was the son (as was supposed) of Joseph, the son of Heli,