Parallel
2 Corinthians 3:5
Nestle 1904 Greek New Testament · Berean Standard Bible
οὐχ ὅτι ἀφ’ ἑαυτῶν ἱκανοί ἐσμεν λογίσασθαί τι ὡς ἐξ ἑαυτῶν ἀλλ’ ἡ ἱκανότης ἡμῶν ἐκ τοῦ Θεοῦ
Not that we are competent in ourselves to claim that anything comes from us, but our competence comes from God.