1 Thessalonians 2:9

μνημονεύετε γάρ ἀδελφοί τὸν κόπον ἡμῶν καὶ τὸν μόχθον νυκτὸς γὰρ καὶ ἡμέρας ἐργαζόμενοι πρὸς τὸ μὴ ἐπιβαρῆσαί τινα ὑμῶν ἐκηρύξαμεν εἰς ὑμᾶς τὸ εὐαγγέλιον τοῦ Θεοῦ