Revelation 10:7

7Butἀλλ’inἐνtheταῖςdaysἡμέραιςof theτῆςvoiceφωνῆςof theτοῦseventhἑβδόμουangelἀγγέλου,whenὅτανhe is aboutμέλλῃto sound [the] trumpetσαλπίζειν,thenκαὶwould be completedἐτελέσθηtheτὸmysteryμυστήριοντοῦof Godθεοῦ,asὡςproclaimedεὐηγγέλισενtheτοὺςof Himselfἑαυτοῦservantsδούλουςtheτοὺςprophetsπροφήτας.

But in the days of the voice of the seventh angel, when he may be about to sound the trumpet, then the mystery of God would be completed, as He proclaimed to His servants, the prophets.”