Matthew 23:10

⁸ But be not ye called Rabbi: for one is your Master, even Christ; and all ye are brethren.

⁹ And call no man your father upon the earth: for one is your Father, which is in heaven.

Neither be ye called masters: for one is your Master, even Christ.

¹¹ But he that is greatest among you shall be your servant.

¹² And whosoever shall exalt himself shall be abased; and he that shall humble himself shall be exalted.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: Nor are you to be called instructors, for you have one Instructor, the Christ.
KJV: Neither be ye called masters: for one is your Master, even Christ.
WEB: Neither be called masters, for one is your master, the Christ.
ASV: Neither be ye called masters: for one is your master, [even] the Christ.
DARBY: Neither be called instructors, for one is your instructor, the Christ.
BLB: Neither shall you⁺ be called instructors, because One is your⁺ Instructor, the Christ.

ÅB: Dere skal ikke la dere kalles lærere heller; for dere har bare en lærer, Kristus.
OTB: Heller ikke skal dere kalles ledere, for dere har én Leder, Kristus.
B1930: Heller ikke skal I la eder kalle lærere; for en er eders lærer, Kristus.