Numbers 4:39

Revised Standard Version (RSV-CI)

from thirty years old up to fifty years old, every one that could enter the service for work in the tent of meeting—

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from thirty years old up to fifty years old, every one that could enter the service, for work in the tent of meeting;

The number of the sons of Gershon, by their families and their fathers' houses,

their number by their families and their fathers' houses was two thousand six hundred and thirty.

Jesus, when he began his ministry, was about thirty years of age, being the son (as was supposed) of Joseph, the son of Heli,