PROS KORINQIOUS B, chapter 7 133:

ἐγὼ δὲ ἥδιστα δαπανήσω καὶ ἐκδαπανηθήσομαι ὑπὲρ τῶν ψυχῶν ὑμῶν. εἰ περισσοτέρωσ ὑμᾶσ ἀγαπῶ, ἧσσον ἀγαπῶμαι;