James 3:5

So the tongue also is a little member, yet boasteth great things. Behold how much matter a little fire kindleth.

Revelation 13:5-6

And there was given him a mouth speaking great things and blasphemy, and authority was given him forty and two months.

2 Peter 2:18

For by speaking swelling words of vanity, they allure thro' the desire of the flesh, thro' wantonness, those that were clean escaped from them that live in error.

Jude 1:16

These are murmurers, complainers, walking after their own desires, and their mouth speaketh great swelling things, having mens persons in admiration for advantage.

Treasury of Scripture Knowledge

Summary

Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth!

Bible References

So

2 Peter 2:18
For by speaking swelling words of vanity, they allure thro' the desire of the flesh, thro' wantonness, those that were clean escaped from them that live in error.
Jude 1:16
These are murmurers, complainers, walking after their own desires, and their mouth speaketh great swelling things, having mens persons in admiration for advantage.
Revelation 13:5
And there was given him a mouth speaking great things and blasphemy, and authority was given him forty and two months.