Matthew 15:14

Let them alone: the blind are leaders of the blind: if the blind may lead the blind, both will fall into the ditch.

Luke 6:39

And He spoke a parable unto them, Whether is the blind able to lead the blind? will they not both fall into the ditch?

Matthew 23:16-24

Woe unto you, blind guides, who are saying, Whosoever may swear by the temple it is nothing; but whosoever may swear by the gold of the temple, he is debtor.

1 Timothy 6:5

wranglings of men having been corrupted as to their mind and turned away from the truth, considering that gain is godliness.

2 Peter 2:1

However there were indeed false prophets among the people, as there will also be false teachers among you, whosoever shall bring in destructive heresies, even denying the Lord who bought them, bringing on themselves swift destruction.

2 Peter 2:17

These are fountains without water, and mists driven away by the storm, for which the blackness of darkness has been reserved.

Revelation 19:20

And the beast, and the false prophet along with him, who wrought miracles in his presence, by which he deceived those having received the mark of the beast, and those worshiping his image; and the two were cast alive into the lake of fire which burns with brimstone.

Revelation 22:15

For without are dogs, and sorcerers, and harlots, and murderers, and idolaters, and every one doing and loving 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
wranglings of men having been corrupted as to their mind and turned away from the truth, considering that gain is godliness.

They

Matthew 23:16
Woe unto you, blind guides, who are saying, Whosoever may swear by the temple it is nothing; but whosoever may swear by the gold of the temple, he is debtor.
Luke 6:39
And He spoke a parable unto them, Whether is the blind able to lead the blind? will they not both fall into the ditch?

And if

2 Peter 2:1
However there were indeed false prophets among the people, as there will also be false teachers among you, whosoever shall bring in destructive heresies, even denying the Lord who bought them, bringing on themselves swift destruction.
Revelation 19:20
And the beast, and the false prophet along with him, who wrought miracles in his presence, by which he deceived those having received the mark of the beast, and those worshiping his image; and the two were cast alive into the lake of fire which burns with brimstone.
Revelation 22:15
For without are dogs, and sorcerers, and harlots, and murderers, and idolaters, and every one doing and loving falsehood.

General references

Mark 8:13
And having left them, coming in again He departed to the other side.
Luke 12:57
Why do you not judge righteous judgment, even with reference to yourselves?
Luke 20:8
And Jesus said to them, Neither do I tell you by what authority I am doing these things.
1 Corinthians 14:38
but if any one ignores, he is ignored.