Proverbs 14:7
Stay away from a foolish man, for you won't find knowledge on his lips.
Proverbs 9:6
Leave your simple ways, and live. Walk in the way of understanding."
Proverbs 13:20
One who walks with wise men grows wise, but a companion of fools suffers harm.
Proverbs 19:27
If you stop listening to instruction, my son, you will stray from the words of knowledge.
1 Corinthians 5:11
But as it is, I wrote to you not to associate with anyone who is called a brother who is a sexual sinner, or covetous, or an idolater, or a slanderer, or a drunkard, or an extortioner. Don't even eat with such a person.
Ephesians 5:11
Have no fellowship with the unfruitful works of darkness, but rather even reprove them.