Proverbs 26:28

A dissembling tongue hateth one that rebuketh him; and a flattering mouth worketh mischief.

Proverbs 29:5

Whoso flattereth his neighbour, layeth a net for his feet.

Proverbs 6:24

that they may keep thee from the evil woman, and from the flattering tongue of the harlot:

Proverbs 7:5

That she may keep thee from the strange woman, and from the harlot which giveth sweet words.

Proverbs 7:21-23

Thus with many sweet words she overcame him, and with her flattering lips she enticed him

Luke 20:20-21

And they watched him, and sent forth spies, which should feign themselves perfect, to take him in his words, and to deliver him unto the power, and authority of the deputy.

John 8:40

But now ye go about to kill me, a man that have told you the truth, which I have heard of God: This did not Abraham.

John 8:44-49

Ye are of your father the devil, and the lusts of your father, ye will do. He was a murderer from the beginning; And abode not in the truth, because there is no truth in him. When he speaketh a lie, then speaketh he of his own. For he is a liar, and the father thereof.

John 10:32-33

Jesus answered them, "Many good works have I showed you from my father: for which of them will ye stone me?"

John 15:22-24

If I had not come and spoken unto them, they should not have had sin: but now have they nothing to cloak their sin withal.

Treasury of Scripture Knowledge

Summary

A lying tongue hateth those that are afflicted by it; and a flattering mouth worketh ruin.

Bible References

A flattering

Proverbs 6:24
that they may keep thee from the evil woman, and from the flattering tongue of the harlot:
Proverbs 7:5
That she may keep thee from the strange woman, and from the harlot which giveth sweet words.
Proverbs 29:5
Whoso flattereth his neighbour, layeth a net for his feet.
Luke 20:20
And they watched him, and sent forth spies, which should feign themselves perfect, to take him in his words, and to deliver him unto the power, and authority of the deputy.

General references

Judges 16:6
And Delilah said to Samson, "Oh, tell me where thy great strength lieth, and if thou were bound wherewith men might constrain thee."
1 Samuel 24:9
and said to Saul, "Wherefore giveth thou an ear to men's words, that say, 'David seeketh thee evil?'
Ezekiel 12:24
There shall no vision be in vain, neither any prophecy fail among the children of Israel: