Matthew 5:34-37

34But I say to you, do not take oaths at all – not by heaven, because it is the throne of God,

35not by earth, because it is his footstool, and not by Jerusalem, because it is the city of the great King.

36Do not take an oath by your head, because you are not able to make one hair white or black.

37Let your word be ‘Yes, yes’ or ‘No, no.’ More than this is from the evil one.