Matthew 5:37
Simply let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ Anything more comes from the evil one.
Berean Standard Bible
But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
But let your ‘Yes’ be ‘Yes’ and your ‘No’ be ‘No.’ Whatever is more than these is of the evil one.