33The [one]ὁhaving receivedλαβὼνHisαὐτοῦτὴνtestimonyμαρτυρίανhas set his sealἐσφράγισενthatὅτιὁGodθεὸςtrueἀληθήςisἐστιν.
The one having received His testimony has sealed that God is true.
ἐσφράγισεν
σφραγίζω
I set a seal upon