James 3:10

out of the same mouth come forth blessing and scolding. My brethren, these things ought not so to be.

Romans 12:14

Bless them that persecute you; bless, and scold not.

1 Corinthians 3:3

for ye are yet carnal. For where there are envy and strife among you, are you not carnal, and walking about according to man?

1 Timothy 5:13

and at the same time they learn to be idle, going about houses; and not only idle, but also loquacious even busybodies, speaking things which they ought not.

1 Peter 3:9

not giving evil for evil, or railing for railing: but on the contrary blessing; because unto this you have been called, that you may inherit the blessing.

Treasury of Scripture Knowledge

Summary

Out of the same mouth proceedeth blessing and cursing. My brethren, these things ought not so to be.

Bible References

Of

Romans 12:14
Bless them that persecute you; bless, and scold not.
1 Peter 3:9
not giving evil for evil, or railing for railing: but on the contrary blessing; because unto this you have been called, that you may inherit the blessing.

These

1 Corinthians 3:3
for ye are yet carnal. For where there are envy and strife among you, are you not carnal, and walking about according to man?
1 Timothy 5:13
and at the same time they learn to be idle, going about houses; and not only idle, but also loquacious even busybodies, speaking things which they ought not.

General references

Matthew 15:18
But those things going out from the mouth come forth from the heart; and these pollute the man.
Romans 3:14
Whose mouth is full of cursing and bitterness.
Romans 12:14
Bless them that persecute you; bless, and scold not.