Psalm 109:2

For the mouth of the sinner is open against me in deceit: his tongue has said false things against me.

Psalm 52:4

Destruction is in all your words, O false tongue.

2 Samuel 15:3-8

And Absalom would say to him, See, your cause is true and right; but no man has been named by the king to give you a hearing.

2 Samuel 17:1

Then Ahithophel said to Absalom, Let me take out twelve thousand men and this very night I will go after David:

Psalm 31:13

False statements against me have come to my ears; fear was on every side: they were talking together against me, designing to take away my life.

Psalm 31:18

Let the false lips be shut, which say evil against the upright, looking down on him in their pride.

Psalm 64:3-4

Who make their tongues sharp like a sword, and whose arrows are pointed, even bitter words;

Psalm 140:3

Their tongues are sharp like the tongue of a snake; the poison of snakes is under their lips. (Selah.)

Proverbs 6:17

Eyes of pride, a false tongue, hands which take life without cause;

Proverbs 12:19

True lips are certain for ever, but a false tongue is only for a minute.

Proverbs 15:28

The heart of the upright gives thought to his answer; but from the mouth of the evil-doer comes a stream of evil things.

Jeremiah 9:3

Their tongues are bent like a bow to send out false words: they have become strong in the land, but not for good faith: they go on from evil to evil, and they have no knowledge of me, says the Lord.

Jeremiah 9:5

Everyone will make sport of his neighbour with deceit, not saying what is true: their tongues have been trained to say false words; they are twisted, hating to come back.

Matthew 26:59-62

Now the chief priests and all the Sanhedrin were looking for false witness against Jesus, so that they might put him to death;

Acts 6:13

And they got false witnesses who said, This man is for ever saying things against this holy place and against the law:

Treasury of Scripture Knowledge

Summary

For the mouth of the wicked and the mouth of the deceitful are opened against me: they have spoken against me with a lying tongue.

Bible References

The mouth

Psalm 31:13
False statements against me have come to my ears; fear was on every side: they were talking together against me, designing to take away my life.
Psalm 64:3
Who make their tongues sharp like a sword, and whose arrows are pointed, even bitter words;
Psalm 140:3
Their tongues are sharp like the tongue of a snake; the poison of snakes is under their lips. (Selah.)
2 Samuel 15:3
And Absalom would say to him, See, your cause is true and right; but no man has been named by the king to give you a hearing.
2 Samuel 17:1
Then Ahithophel said to Absalom, Let me take out twelve thousand men and this very night I will go after David:
Proverbs 15:28
The heart of the upright gives thought to his answer; but from the mouth of the evil-doer comes a stream of evil things.
Matthew 26:59
Now the chief priests and all the Sanhedrin were looking for false witness against Jesus, so that they might put him to death;

With

Proverbs 6:17
Eyes of pride, a false tongue, hands which take life without cause;
Proverbs 12:19
True lips are certain for ever, but a false tongue is only for a minute.
Jeremiah 9:3
Their tongues are bent like a bow to send out false words: they have become strong in the land, but not for good faith: they go on from evil to evil, and they have no knowledge of me, says the Lord.
Acts 6:13
And they got false witnesses who said, This man is for ever saying things against this holy place and against the law:

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain