Proverbs 14:7
Go from before a foolish man when you do not see in him the lips of knowledge.
Proverbs 9:6
Forsake the foolish and live; and go in the way of understanding.
Proverbs 13:20
He who walks with the wise shall be wise, but a companion with fools shall be destroyed.
Proverbs 19:27
My son, cease to hear the discipline, only to stray from the words of knowledge.
1 Corinthians 5:11
But now I have written to you not to associate intimately, if any man called a brother and is either a fornicator, or covetous, or an idolater, or a reviler, or a drunkard, or an extortioner; with such a one not to eat.
Ephesians 5:11
And have no fellowship with the unfruitful works of darkness, but rather reprove them.