Parallel
Revelation 1:10
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ἐγενόμην ἐν πνεύματι ἐν τῇ κυριακῇ ἡμέρᾳ, καὶ ἤκουσα φωνὴν ὀπίσω μου μεγάλην ὡς σάλπιγγος
On the Lord’s day I was in the Spirit, and I heard behind me a loud voice like a trumpet,