"But you are not to be called 'Rabbi,' for you have only one Master and you are all brothers.
And do not call anyone on earth 'father,' for you have one Father,1 and he is in heaven.
References for Matthew 23:9
Nor are you to be called 'teacher,' for you have one Teacher, the Christ.
References for Matthew 23:10
The greatest among you will be your servant.2
References for Matthew 23:11