Matthew 15:14

Let them alone; they are blind guides. And if a blind man leads a blind man, both will fall into a pit."

Luke 6:39

He also told them a parable: "Can a blind man lead a blind man? Will they not both fall into a pit?

Matthew 23:16-24

"Woe to you, blind guides, who say, 'If any one swears by the temple, it is nothing; but if any one swears by the gold of the temple, he is bound by his oath.'

1 Timothy 6:5

and constant friction between men of depraved mind and deprived of the truth, who imagine that godliness is a means of gain.

2 Peter 2:1

But false prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves.

2 Peter 2:17

These are springs without water and mists driven by a storm; for them the blackest darkness has been reserved.

Revelation 19:20

And the beast was captured, and with him the false prophet who had performed the signs in his presence, by which he deceived those who had received the mark of the beast and those who worshipped his image. These two were thrown alive into the lake of fire which burns with sulfur.

Revelation 22:15

Outside are the dogs and the sorcerers and the immoral persons and the murderers and the idolaters, and everyone who loves and practices falsehood.

Treasury of Scripture Knowledge

Summary

Let them alone: they be blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch.

Bible References

Let

1 Timothy 6:5
and constant friction between men of depraved mind and deprived of the truth, who imagine that godliness is a means of gain.

They

Matthew 23:16
"Woe to you, blind guides, who say, 'If any one swears by the temple, it is nothing; but if any one swears by the gold of the temple, he is bound by his oath.'
Luke 6:39
He also told them a parable: "Can a blind man lead a blind man? Will they not both fall into a pit?

And if

2 Peter 2:1
But false prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves.
Revelation 19:20
And the beast was captured, and with him the false prophet who had performed the signs in his presence, by which he deceived those who had received the mark of the beast and those who worshipped his image. These two were thrown alive into the lake of fire which burns with sulfur.
Revelation 22:15
Outside are the dogs and the sorcerers and the immoral persons and the murderers and the idolaters, and everyone who loves and practices falsehood.

General references

Mark 8:13
And he left them, and getting into the boat again he departed to the other side.
Luke 12:57
"And why do you not judge for yourselves what is right?
Luke 20:8
And Jesus said to them, "Neither will I tell you by what authority I do these things."
1 Corinthians 14:38
But if anyone does not recognize this, he is not recognized.