Matthew 23:7-10 NIV

[7] they love to be greeted with respect in the marketplaces and to be called ‘Rabbi’ by others. [8] “But you are not to be called ‘Rabbi,’ for you have one Teacher, and you are all brothers. [9] And do not call anyone on earth ‘father,’ for you have one Father, and he is in heaven. [10] Nor are you to be called instructors, for you have one Instructor, the Messiah.