'Blind Guides' in the Bible

Let them alone; they are blind guides of the blind, and if one blind man leads another, both of them will fall into a pit."

Woe to you, blind guides that you are! you say, 'Swear by the sanctuary, and it means nothing; but swear by the gold of the sanctuary, and the oath is binding.'

Blind guides that you are, filtering away the gnat and swallowing the camel!