Num 4:3From 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.
Jer 36:21So the king sent Jehudi to fetch the roll: and he took it out of Elishama the scribe's chamber. And Jehudi read it in the ears of the king, and in the ears of all the princes which stood beside the king.
Act 18:6And when they opposed themselves, and blasphemed, he shook his raiment, and said unto them, Your blood be upon your own heads; I am clean: from henceforth I will go unto the Gentiles.