Romans 16:18

for such as these serve not our Lord Jesus Christ, but their own selfishness; and by flourish and flattery, deceive the open-hearted simple.

James 1:8

a diffident man is inconstant in all his actions.

1 Thessalonians 2:5

our address to you was without any flattery, as you yourselves can witness, and God is witness that we had no avarice to disguise.

Treasury of Scripture Knowledge

Summary

They speak vanity every one with his neighbour: with flattering lips and with a double heart do they speak.

General references

Bible References

Flattering

Romans 16:18
for such as these serve not our Lord Jesus Christ, but their own selfishness; and by flourish and flattery, deceive the open-hearted simple.
1 Thessalonians 2:5
our address to you was without any flattery, as you yourselves can witness, and God is witness that we had no avarice to disguise.

General references

Acts 12:22
at which the people gave a shout, saying, it is the voice of a God, and not of a man.