Neither be ye called masters: for one is your Master, [even] Christ.
Berean Study Bible (BSB) - Matthew 23:10 >Nor are you to be called instructors, for you have one Instructor, the Christ.
Textus Receptus (TR) - Matthew 23:10 >Μηδὲ κληθῆτε καθηγηταί· εἷς γὰρ ὑμῶν ἐστιν ὁ καθηγητής, ὁ Χριστός.