'Blind Guides' in the Bible

Let them alone: they are blind guides. And if the blind guide the blind, both shall fall into a pit.

Woe unto you, ye blind guides, that say, Whosoever shall swear by the temple, it is nothing; but whosoever shall swear by the gold of the temple, he is a debtor.

Ye blind guides, that strain out the gnat, and swallow the camel!