'Blind Guides' in the Bible

Let them alone; they are blind guides; and if a blind man be guiding a blind man, both will fall into a pit."

"Woe to you, blind guides, who say, 'Whosoever swears by the temple, it is nothing; but whosoever swears by the gold of the temple, he is a debtor!'

Blind guides! straining out the gnat, and swallowing the camel!