Matthew 15:14

Let them alone; they are blind leaders of the blind. And if the blind lead the blind, both will fall into a ditch.

Luke 6:39

And he spoke also a parable to them: Can the blind lead the blind? Will they not both fall into a ditch?

Matthew 23:16-24

Woe to you, blind guides, that say, Whoever sweareth by the temple, it is nothing; but whoever sweareth by the gold of the temple, is bound.

1 Timothy 6:5

incessant disputings of men corrupted in their minds, and destitute of the truth, supposing that godliness is gain.

2 Peter 2:1

But there arose false prophets also among the people, as there will be false teachers among you also, who will stealthily bring in destructive factions, even denying the Lord that bought them; bringing upon themselves swift destruction.

2 Peter 2:17

These are wells without water, and mists driven by a tempest; for whom the blackness of darkness is reserved.

Revelation 19:20

And the beast was seized and he who was with him, the false prophet who wrought the signs in his presence, with which he deceived those who received the mark of the beast, and who worshipped his image; the two were cast alive into the lake of fire burning with brimstone.

Revelation 22:15

Without are dogs, and sorcerers, and fornicators, and murderers, and idolaters, and whoever loveth and practiseth 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
incessant disputings of men corrupted in their minds, and destitute of the truth, supposing that godliness is gain.

They

Matthew 23:16
Woe to you, blind guides, that say, Whoever sweareth by the temple, it is nothing; but whoever sweareth by the gold of the temple, is bound.
Luke 6:39
And he spoke also a parable to them: Can the blind lead the blind? Will they not both fall into a ditch?

And if

2 Peter 2:1
But there arose false prophets also among the people, as there will be false teachers among you also, who will stealthily bring in destructive factions, even denying the Lord that bought them; bringing upon themselves swift destruction.
Revelation 19:20
And the beast was seized and he who was with him, the false prophet who wrought the signs in his presence, with which he deceived those who received the mark of the beast, and who worshipped his image; the two were cast alive into the lake of fire burning with brimstone.
Revelation 22:15
Without are dogs, and sorcerers, and fornicators, and murderers, and idolaters, and whoever loveth and practiseth falsehood.

General references

Mark 8:13
And leaving them, he again went on board and crossed to the other side.
Luke 12:57
And why even of yourselves do ye not judge what is right?
Luke 20:8
And Jesus said to them, Neither do I tell you by what authority I do these things.
1 Corinthians 14:38
but if any one be ignorant, let him be ignorant!