Matthew 5:36-39

36Do not swear by your head, because you cannot make a single hair white or black.

37But let your ‘yes’ mean ‘yes,’ and your ‘no’ mean ‘no.’ Anything more than this is from the evil one.

38“You have heard that it was said, An eye for an eye and a tooth for a tooth.

39But I tell you, don’t resist an evildoer. On the contrary, if anyone slaps you on your right cheek, turn the other to him also.