Matthew 5:36-37
36
And do not take an oath by your head, for you cannot make one hair white or black.
37
Let what you say be simply 'Yes' or 'No'; v anything more than this comes from evil.
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Cross References
Proverbs 10:19
When words are many, transgression is not lacking, but whoever restrains his lips is prudent.
English Standard Version (ESV) The Holy Bible, English Standard Version Copyright © 2001 by Crossway Bibles, a division of Good News Publishers.