Matthew 23:8-11

23:8 But you are not to be called ‘Rabbi,’ for you have one Teacher and you are all brothers. 23:9 And call no one your ‘father’ on earth, for you have one Father, who is in heaven. 23:10 Nor are you to be called ‘teacher,’ for you have one teacher, the Christ. 23:11 The greatest among you will be your servant.

Galatians 2:4

2:4 Now this matter arose because of the false brothers with false pretenses who slipped in unnoticed to spy on our freedom that we have in Christ Jesus, to make us slaves.