3 Bible Verses about Warnings Of Evil Associations

When I formerly writ to you, not to keep company with the vicious:

Are you not become associates with infidels? but what affinity is there between virtue and vice? and what communication has light with darkness?

but my meaning was, not to keep company with any christian known to be vicious, or covetous, or an idolater, or a railer, or a drunkard, or rapacious, no not even to eat with such a one.