2 Timothy 2:13

13ifεἰwe are faithlessἀπιστοῦμεν,Heἐκεῖνοςfaithfulπιστὸςremainsμένει·to denyἀρνήσασθαιHimselfἑαυτὸνnotοὐHe is ableδύναται.

if we are faithless, He remains faithful, for He is not able to deny Himself.