James 3:10

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

Romans 12:14

bless and curse not.

1 Corinthians 3:3

For ye are still carnal: for while there is among you emulation, and strife, and divisions, are ye not carnal, and walk according to man?

1 Timothy 5:13

And withal they learn to be idle, going about from house to house; and not only idle, but tattlers and busy bodies, speaking what they ought not.

1 Peter 3:9

Not rendering evil for evil, or railing for railing, but contrariwise blessing; knowing that ye are called to this, to inherit a 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 and curse not.
1 Peter 3:9
Not rendering evil for evil, or railing for railing, but contrariwise blessing; knowing that ye are called to this, to inherit a blessing.

These

1 Corinthians 3:3
For ye are still carnal: for while there is among you emulation, and strife, and divisions, are ye not carnal, and walk according to man?
1 Timothy 5:13
And withal they learn to be idle, going about from house to house; and not only idle, but tattlers and busy bodies, speaking what they ought not.

General references

Matthew 15:18
But those things which proceed out of the mouth, come out of the heart, and they defile the man.
Romans 3:14
Whose mouth is full of cursing and bitterness;
Romans 12:14
bless and curse not.