James 1:26
If any man among you seem to be religious, and bridles not his tongue, but deceives his own heart, this man's religion is vain.
Topicalbible.org—AKJV

Proverbs 15:4
A wholesome tongue is a tree of life: but perverseness therein is a breach in the spirit.
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James 3:5-10
Even so the tongue is a little member, and boasts great things. Behold, how great a matter a little fire kindles!
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Proverbs 18:21
Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.
Topicalbible.org—AKJV