New International Version
All you need to say is simply 'Yes' or 'No'; anything beyond this comes from the evil one.

American Standard Version
But let your speech be, Yea, yea; Nay, nay: and whatsoever is more than these is of the evil one .

Berean Study Bible
Simply let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ Anything more comes from the evil one.

Douay-Rheims Bible
But let your speech be yea, yea: no, no: and that which is over and above these, is of evil.

English Revised Version
But let your speech be, Yea, yea; Nay, nay: and whatsoever is more than these is of the evil one.

King James Bible
But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.

World English Bible
But let your 'Yes' be 'Yes' and your 'No' be 'No.' Whatever is more than these is of the evil one.

Young's Literal Translation
but let your word be, Yes, Yes, No, No, and that which is more than these is of the evil.

Matthew 5:37 Additional Translations ...