Acts 17:5

But the Jews, becoming jealous, engaged some worthless fellows from the streets, and, getting a mob together, kept the city in an uproar. They attacked Jason's house, with the intention of bringing Paul and Silas before the Popular Assembly;

1 Corinthians 14:20

Brothers, do not show yourselves children in understanding. In wickedness be infants, but in understanding show yourselves men.

Titus 1:10

There are, indeed, many unruly persons--great talkers who deceive themselves, principally converts from Judaism,

Hebrews 5:12

For whereas, considering the time that has elapsed, you ought to be teaching others, you still need some one to teach you the very alphabet of the Divine Revelation, and need again to be fed with 'milk' instead of with 'solid 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 Jews, becoming jealous, engaged some worthless fellows from the streets, and, getting a mob together, kept the city in an uproar. They attacked Jason's house, with the intention of bringing Paul and Silas before the Popular Assembly;
Titus 1:10
There are, indeed, many unruly persons--great talkers who deceive themselves, principally converts from Judaism,