Jude 1:15

to execute judgment on all, and to convict all the wicked among them of all the deeds of impiety which they have impiously committed, and of all the hard speeches which impious sinners have spoken against him.

Matthew 10:25

It is sufficient for the disciple to be as his teacher, and the servant as his master. If they have called the master of the house Beelzebul, how much more will they call the members of his family by that name.

Matthew 12:24

But the Pharisees hearing it, said, This man does not cast out demons, except by Beelzebul, a ruler of the demons.

John 8:44

You are of your father the devil, and the desires of your father you will to do. He was a murderer from the beginning and stood not by the truth; for truth is not in him. When he speaks a lie, he speaks from his own; for he is a liar, and the father of him [that lies].

John 8:48

The Jews answered and said to him, Say we not well that you are a Samaritan, and have a demon?

Acts 25:7

And when he had come, the Jews who had come down from Jerusalem stood around him, bringing many and weighty accusations which they could not prove,

Revelation 21:8

But the fearful and unbelieving and abominable and murderers and fornicators and sorcerers and idolaters and all liars shall have their part in the lake which burns with fire and sulphur, which is the second death.

Revelation 22:15

Without are dogs and sorcerers, and fornicators, and murderers and idolaters and whoever loves and practises falsehood.

Treasury of Scripture Knowledge

Summary

Let the lying lips be put to silence; which speak grievous things proudly and contemptuously against the righteous.

Grievous things

Bible References

The lying

John 8:44
You are of your father the devil, and the desires of your father you will to do. He was a murderer from the beginning and stood not by the truth; for truth is not in him. When he speaks a lie, he speaks from his own; for he is a liar, and the father of him [that lies].
Revelation 21:8
But the fearful and unbelieving and abominable and murderers and fornicators and sorcerers and idolaters and all liars shall have their part in the lake which burns with fire and sulphur, which is the second death.
Revelation 22:15
Without are dogs and sorcerers, and fornicators, and murderers and idolaters and whoever loves and practises falsehood.

Speak

Matthew 10:25
It is sufficient for the disciple to be as his teacher, and the servant as his master. If they have called the master of the house Beelzebul, how much more will they call the members of his family by that name.
Matthew 12:24
But the Pharisees hearing it, said, This man does not cast out demons, except by Beelzebul, a ruler of the demons.
John 8:48
The Jews answered and said to him, Say we not well that you are a Samaritan, and have a demon?
Acts 25:7
And when he had come, the Jews who had come down from Jerusalem stood around him, bringing many and weighty accusations which they could not prove,

Grievous things

Jude 1:15
to execute judgment on all, and to convict all the wicked among them of all the deeds of impiety which they have impiously committed, and of all the hard speeches which impious sinners have spoken against him.