Luke 3:23

And Jesus was about thirty years old when He began to teach. (It was assumed that) He was the son of Joseph, who was the [legal] son of Heli [Note: A lineage through Jesus' mother Mary follows:]

2 Corinthians 10:3-4

For although we live in the world [i.e., in a human body], we do not wage war [i.e., for God and against evil] on a worldly level [i.e., by using the tactics of unsaved people].

Ephesians 6:10-18

Finally, be [spiritually] strong in the Lord and in His mighty power.

1 Timothy 1:18

I give you this instruction, my son Timothy, in keeping with the previously spoken prophecies [i.e., predictions] about you, so that by [following] them you will fight the good battle,

1 Timothy 3:1

This is a trustworthy saying: If any man eagerly desires to be an overseer [i.e., an elder], he desires a noble task.

1 Timothy 3:6

[He must] not be a new convert or else he could become conceited [i.e., over being in a leadership position] and fall into the [same] condemnation incurred by the devil.

Treasury of Scripture Knowledge

Summary

From thirty years old and upward even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.

Bible References

Enter

2 Corinthians 10:3
For although we live in the world [i.e., in a human body], we do not wage war [i.e., for God and against evil] on a worldly level [i.e., by using the tactics of unsaved people].
Ephesians 6:10
Finally, be [spiritually] strong in the Lord and in His mighty power.
1 Timothy 1:18
I give you this instruction, my son Timothy, in keeping with the previously spoken prophecies [i.e., predictions] about you, so that by [following] them you will fight the good battle,

To do

1 Timothy 3:1
This is a trustworthy saying: If any man eagerly desires to be an overseer [i.e., an elder], he desires a noble task.