Genesis 37:2

37:2 This is the account of Jacob.

Joseph, his seventeen-year-old son, was taking care of the flocks with his brothers. Now he was a youngster working with the sons of Bilhah and Zilpah, his father’s wives. Joseph brought back a bad report about them to their father.

Numbers 4:3

4:3 from thirty years old and upward to fifty years old, all who enter the company to do the work in the tent of meeting.

Numbers 4:2

4:2 “Take a census of the Kohathites from among the Levites, by their families and by their clans,

Numbers 5:4

5:4 So the Israelites did so, and expelled them outside the camp. As the Lord had spoken to Moses, so the Israelites did.

Luke 3:23

The Genealogy of Jesus

3:23 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,