"Again, you have heard that it was said to those of ancient times, "You shall not swear falsely, but carry out the vows you have made to the Lord.'
But I say to you, Do not swear at all, either by heaven, for it is the throne of God,
or by the earth, for it is his footstool, or by Jerusalem, for it is the city of the great King.
And do not swear by your head, for you cannot make one hair white or black.
Let your word be "Yes, Yes' or "No, No'; anything more than this comes from the evil one. a
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (New Revised Standard Bible Version Online)