Numbers 4:35

from thirty years old and upward even to fifty years old, everyone who entered into the service, for work in the Tent of Meeting.

Numbers 4:23

you shall count them from thirty years old and upward until fifty years old; all who enter in to wait on the service, to do the work in the Tent of Meeting.

1 Chronicles 23:24

These were the sons of Levi after their fathers' houses, even the heads of the fathers' houses of those who were counted individually, in the number of names by their polls, who did the work for the service of the house of Yahweh, from twenty years old and upward.

Numbers 4:3

from thirty years old and upward even until fifty years old, all who enter into the service, to do the work in the Tent of Meeting.

Numbers 4:30

you shall count them from thirty years old and upward even to fifty years old, everyone who enters on the service, to do the work of the Tent of Meeting.

Numbers 4:39

from thirty years old and upward even to fifty years old, everyone who entered into the service, for work in the Tent of Meeting,

Numbers 4:43

from thirty years old and upward even to fifty years old, everyone who entered into the service, for work in the Tent of Meeting,

Numbers 4:47

from thirty years old and upward even to fifty years old, everyone who entered in to do the work of service, and the work of bearing burdens in the Tent of Meeting,

Numbers 8:24-26

"This is that which belongs to the Levites: from twenty-five years old and upward they shall go in to wait on the service in the work of the Tent of Meeting;

1 Chronicles 23:3

The Levites were numbered from thirty years old and upward: and their number by their polls, man by man, was thirty-eight thousand.

1 Chronicles 23:26-27

Also the Levites will no longer need to carry the tabernacle and all its vessels for its service."

1 Chronicles 28:13

also for the divisions of the priests and the Levites, and for all the work of the service of the house of Yahweh, and for all the vessels of service in the house of Yahweh;

Luke 3:23

Jesus himself, when he began to teach, was about thirty years old, being the son (as was supposed) of Joseph, the son of Heli,

1 Timothy 3:6

not a new convert, lest being puffed up he fall into the same condemnation as the devil.

Treasury of Scripture Knowledge

Summary

From thirty years old and upward even unto fifty years old, every one that entereth into the service, for the work in the tabernacle of the congregation:

Bible References

General references

Numbers 4:3
from thirty years old and upward even until fifty years old, all who enter into the service, to do the work in the Tent of Meeting.
Numbers 8:24
"This is that which belongs to the Levites: from twenty-five years old and upward they shall go in to wait on the service in the work of the Tent of Meeting;
1 Chronicles 23:3
The Levites were numbered from thirty years old and upward: and their number by their polls, man by man, was thirty-eight thousand.
1 Chronicles 28:13
also for the divisions of the priests and the Levites, and for all the work of the service of the house of Yahweh, and for all the vessels of service in the house of Yahweh;
Luke 3:23
Jesus himself, when he began to teach, was about thirty years old, being the son (as was supposed) of Joseph, the son of Heli,
1 Timothy 3:6
not a new convert, lest being puffed up he fall into the same condemnation as the devil.