3 Bible Verses about Warnings Of Evil Associations

I have written to you in the letter not to associate with lewd persons;

Be not unequally yoked together with unbelievers: for what fellowship has righteousness with lawlessness? What communion has light with darkness?

but now I write to you, not to associate with any one professing to be a brother, if he is lewd or covetous, or an idolater, or a reviler, or a drunkard, or an extortioner: with such a one not even to eat.