Acts 17:5

But the unbelieving Jews, taking with them some evil men, who were loungers about the markets, and collecting a mob, set the city in an uproar; and having assaulted the house of Jason, they sought to bring them out to the people.

1 Corinthians 14:20

Brethren, be not children in understanding: yet, in malice, be childlike; but, in understanding, be full-grown men.

Titus 1:10

For there are many unruly and vain talkers and deceivers, especially those of the circumcision,

Hebrews 5:12

For though you ought to be teachers, considering the time, yet you have need that some one teach you again what are the first elements of the oracles of God; and you have be come such as have need of milk, and not of strong food.

Treasury of Scripture Knowledge

Summary

And there are gathered unto him vain men, the children of Belial, and have strengthened themselves against Rehoboam the son of Solomon, when Rehoboam was young and tenderhearted, and could not withstand them.

Bible References

Vain men

Acts 17:5
But the unbelieving Jews, taking with them some evil men, who were loungers about the markets, and collecting a mob, set the city in an uproar; and having assaulted the house of Jason, they sought to bring them out to the people.
Titus 1:10
For there are many unruly and vain talkers and deceivers, especially those of the circumcision,