εἰς παροξυσμὸν ἀγάπης καὶ καλῶν ἔργων

From LSJ

ἡ γὰρ σιωπὴ μαρτυρεῖ τὸ μὴ θέλειν → silence is evidence of unwillingness (Menander)

Source

Dutch (Woordenboekgrieks.nl)

ter stimulering van liefde en goede daden NT Hebr. 10.24.