Matthew 12:36-37

And I say to you, that for every idle word that men shall speak, they will give account in the day of judgment.

James 1:26

If any one thinks that he is religious, and bridles not his tongue, but deceives his own heart, this mans religion is vain.

James 3:2-12

For in many things we all offend. If any one offend not in speech, the same is a perfect man, able to bridle the whole body also.

Treasury of Scripture Knowledge

Summary

He that keepeth his mouth keepeth his life: but he that openeth wide his lips shall have destruction.

General references

Bible References

General references

Matthew 12:36
And I say to you, that for every idle word that men shall speak, they will give account in the day of judgment.
James 1:26
If any one thinks that he is religious, and bridles not his tongue, but deceives his own heart, this mans religion is vain.
James 3:2
For in many things we all offend. If any one offend not in speech, the same is a perfect man, able to bridle the whole body also.