Proverbs 26:25

but when he speaketh fair, believe him not, for there are seven abominations in his heart.

Psalm 28:3

O pluck me not away, neither destroy me with the ungodly and wicked doers, which speak friendly to their neighbours, but imagine mischief in their hearts.

Psalm 12:2

They talk of vanity every one with his neighbour; they do but flatter with their lips, and dissemble in their double heart.

Proverbs 6:16-19

These six things doth the LORD hate, and the seventh he utterly abhorreth:

Jeremiah 9:2-8

Would God that I had a cottage somewhere far from folk, that I might leave my people, and go from them: for they be all adulterers and a shrinking sort.

Jeremiah 12:6

For thy brethren and thy kindred have altogether despised thee, and cried out upon thee in thine absence. Believe them not, though they speak fair words to thee.

Micah 7:5

Let no man believe his friend, nor put his confidence in a prince. Keep the door of thy mouth, from her that lieth in thy bosom:

Matthew 24:23

Then if any man shall say unto you, 'Lo, here is Christ,' or 'There is Christ': believe it not:

Treasury of Scripture Knowledge

Summary

When he speaketh fair, believe him not: for there are seven abominations in his heart.

General references

Bible References

Speaketh fair

Psalm 12:2
They talk of vanity every one with his neighbour; they do but flatter with their lips, and dissemble in their double heart.
Psalm 28:3
O pluck me not away, neither destroy me with the ungodly and wicked doers, which speak friendly to their neighbours, but imagine mischief in their hearts.
Jeremiah 9:2
Would God that I had a cottage somewhere far from folk, that I might leave my people, and go from them: for they be all adulterers and a shrinking sort.
Micah 7:5
Let no man believe his friend, nor put his confidence in a prince. Keep the door of thy mouth, from her that lieth in thy bosom:

Believe

Jeremiah 12:6
For thy brethren and thy kindred have altogether despised thee, and cried out upon thee in thine absence. Believe them not, though they speak fair words to thee.
Matthew 24:23
Then if any man shall say unto you, 'Lo, here is Christ,' or 'There is Christ': believe it not:

Seven

Proverbs 6:16
These six things doth the LORD hate, and the seventh he utterly abhorreth:

General references

Numbers 23:12
And he answered, and said, "Must I not keep that and speak it, which the LORD hath put in my mouth?"