Let Your “Yes” be “Yes,” and Your “No,” “No”
“Again, you have heard that it was said to the ancients, ‘Do not break your oath, but fulfill your vows to the Lord.’ But I tell you not to swear at all: either by heaven, for it is God’s throne; or by the earth, for it is His footstool; or by Jerusalem, for it is the city of the great King. Nor should you swear by your head, for you cannot make a single hair white or black. Simply let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ Anything more comes from the evil one.”