Parallel
Matthew 5:36
CNTR Statistical Restoration · Berean Standard Bible
μήτε ἐν τῇ κεφαλῇ σου ὀμόσῃς, ὅτι οὐ δύνασαι μίαν τρίχα λευκὴν ποιῆσαι ἢ μέλαιναν.
Nor should you swear by your head, for you cannot make a single hair white or black.