Revelation 8:2

8:2 Then I saw the seven angels who stand before God, and seven trumpets were given to them.

Revelation 8:6

8:6 Now the seven angels holding the seven trumpets prepared to blow them.

Revelation 1:20

1:20 The mystery of the seven stars that you saw in my right hand and the seven golden lampstands is this: The seven stars are the angels of the seven churches and the seven lampstands are the seven churches.

Revelation 17:9

17:9 (This requires a mind that has wisdom.) The seven heads are seven mountains the woman sits on. They are also seven kings: