Mattityahu 5:35-37

Orthodox Jewish Bible

³⁵ nor by haaretz, for it is the hadom (footstool) of his feet, nor by Yerushalayim, for it is the kiryat melech rav (city of the great king, TEHILLIM 48:3[2]).

³⁶ Neither are you to swear by your rosh, for you are not able to make one hair turn white or black.

³⁷ But let your word be ken, ken (yes, yes) or lo, lo (no, no), but anything beyond this is lashon horah.