33 “You have also heard that people were told in the past, ‘Do not break your promise, but do what you have vowed to the Lord to do.’
34 But now I tell you: do not use any vow when you make a promise. Do not swear by heaven, for it is God's throne;
35 nor by earth, for it is the resting place for his feet; nor by Jerusalem, for it is the city of the great King.
36 Do not even swear by your head, because you cannot make a single hair white or black.
37 Just say ‘Yes’ or ‘No’ — anything else you say comes from the Evil One.
38 “You have heard that it was said, ‘An eye for an eye, and a tooth for a tooth.’
39 But now I tell you: do not take revenge on someone who wrongs you. If anyone slaps you on the right cheek, let him slap your left cheek too.