PROS GALATAS, chapter 1 56:

ὁ οὖν ἐπιχορηγῶν ὑμῖν τὸ πνεῦμα καὶ ἐνεργῶν δυνάμεισ ἐν ὑμῖν ἐξ ἔργων νόμου ἢ ἐξ ἀκοῆσ πίστεωσ;