Proverbs 15:2

15:2 The tongue of the wise treats knowledge correctly,

but the mouth of the fool spouts out folly.

Proverbs 15:28

15:28 The heart of the righteous considers how to answer,

but the mouth of the wicked pours out evil things.

Matthew 15:14

15:14 Leave them! They are blind guides. If someone who is blind leads another who is blind, both will fall into a pit.”

Matthew 23:16-26

23:16 “Woe to you, blind guides, who say, ‘Whoever swears by the temple is bound by nothing. But whoever swears by the gold of the temple is bound by the oath.’ 23:17 Blind fools! Which is greater, the gold or the temple that makes the gold sacred? 23:18 And, ‘Whoever swears by the altar is bound by nothing. But if anyone swears by the gift on it he is bound by the oath.’ 23:19 You are blind! For which is greater, the gift or the altar that makes the gift sacred? 23:20 So whoever swears by the altar swears by it and by everything on it. 23:21 And whoever swears by the temple swears by it and the one who dwells in it. 23:22 And whoever swears by heaven swears by the throne of God and the one who sits on it.

23:23 “Woe to you, experts in the law and you Pharisees, hypocrites! You give a tenth of mint, dill, and cumin, yet you neglect what is more important in the law – justice, mercy, and faithfulness! You should have done these things without neglecting the others. 23:24 Blind guides! You strain out a gnat yet swallow a camel!

23:25 “Woe to you, experts in the law and you Pharisees, hypocrites! You clean the outside of the cup and the dish, but inside they are full of greed and self-indulgence. 23:26 Blind Pharisee! First clean the inside of the cup, so that the outside may become clean too!

Luke 6:39-40

6:39 He also told them a parable: “Someone who is blind cannot lead another who is blind, can he? Won’t they both fall into a pit? 6:40 A disciple is not greater than his teacher, but everyone when fully trained will be like his teacher.