Revelation 8:6

6AndΚαὶtheοἱsevenἑπτὰangelsἄγγελοιοἱhavingἔχοντεςtheτὰςsevenἑπτὰtrumpetsσάλπιγγαςpreparedἡτοίμασανthemselvesαὑτοὺςthatἵναthey might sound the trumpetsσαλπίσωσιν.

And the seven angels having the seven trumpets prepared themselves, that they might sound the trumpets.