'Blind Guides' in the Bible

Let them go: they are blind guides of the blind. And if the blind guide the blind, both shall fall into the ditch.

Woe to you blind guides, saying, Whoever should swear by the temple, it is nothing; but whoever should swear by the gold of the temple, he is indebted!

Blind guides, straining a gnat, and swallowing down a camel.