Titus 1:9

9holding toἀντεχόμενονtheτοῦaccording toκατὰtheτὴνteachingδιδαχὴνfaithfulπιστοῦwordλόγου,thatἵναableδυνατὸςhe may beᾖbothκαὶto encourageπαρακαλεῖνwithἐντῇteachingδιδασκαλίᾳτῇsoundὑγιαινούσῃandκαὶthoseτοὺςcontradicting [it]ἀντιλέγονταςto convictἐλέγχειν.

holding to the faithful word according to the teaching, that he may be able both to exhort in sound teaching and to convict those contradicting [it].