Matthew 23:7-10

7they 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. 9And do not call anyone on earth ‘father,’ for you have one Father, and he is in heaven. 10Nor are you to be called instructors, for you have one Instructor, the Messiah.