Matthew 23:8-12 NKJV
But you, do not be called ‘Rabbi’; for One is your Teacher, the Christ, and you are all brethren. Do not call anyone on earth your father; for One is your Father, He who is in heaven. And do not be called teachers; for One is your Teacher, the Christ. But he who is greatest among you shall be your servant. And whoever exalts himself will be humbled, and he who humbles himself will be exalted.
NKJV: New King James Version