Matthew 23:10
Neither assume the title 'Master' [i.e., teacher], for [only] one is your Master, the Christ [i.e., God's specially chosen one].
Treasury of Scripture Knowledge
Summary
Neither be ye called masters: for one is your Master, even Christ.
General references
Bible References
General references
Luke 22:26
But it will not be that way among you, for the person who is the most important among you should become [like] the youngest [i.e., least important]. And the person who is the leader should become like the servant.