Revelation 1:4

John to the seven churches in Asia---Grace and peace be to you, from Him who is, and who was, and who is to come; and from the seven Spirits which are before his throne;

Revelation 1:20

As to the mystery of the seven stars which thou sawest in my right hand, and the seven golden candlesticks; the seven stars are the angels of the seven churches, and the seven candlesticks which thou sawest are the seven churches.

Revelation 5:1

And I saw on the right hand of Him that sat on the throne a book written within and without, sealed with seven seals:

Revelation 5:6

And I beheld, and lo, in the midst of the throne, and of the four animals, and in the midst of the elders, stood a Lamb, as it had been slain, having seven horns and seven eyes, which are the seven spirits of God, sent forth into all the earth.

Revelation 8:2

and I saw the seven angels, that stood before God; and seven trumpets were given to them.

Revelation 8:6

And the seven angels, that had the seven trumpets, prepared themselves to sound their trumpets.

Revelation 10:3

And he cried with a loud voice like the roaring of a lion; and when he had cried, seven thunders uttered their voices.

Revelation 15:1

And I saw another sign in heaven great and wonderful, ---seven angels, having the seven last plagues, for in them the wrath of God is finished.

Revelation 15:7

And one of the four living beings gave to the seven angels seven golden vials full of the wrath of God, who liveth for ever and ever.

Revelation 16:1

And I heard a great voice from the temple, saying to the seven angels, Go and pour out the vials of the wrath of God upon the earth.

Treasury of Scripture Knowledge

Summary

And seven priests shall bear before the ark seven trumpets of rams' horns: and the seventh day ye shall compass the city seven times, and the priests shall blow with the trumpets.

Bible References

Seven times

Revelation 1:4
John to the seven churches in Asia---Grace and peace be to you, from Him who is, and who was, and who is to come; and from the seven Spirits which are before his throne;
Revelation 5:1
And I saw on the right hand of Him that sat on the throne a book written within and without, sealed with seven seals:
Revelation 8:2
and I saw the seven angels, that stood before God; and seven trumpets were given to them.
Revelation 10:3
And he cried with a loud voice like the roaring of a lion; and when he had cried, seven thunders uttered their voices.
Revelation 15:1
And I saw another sign in heaven great and wonderful, ---seven angels, having the seven last plagues, for in them the wrath of God is finished.
Revelation 16:1
And I heard a great voice from the temple, saying to the seven angels, Go and pour out the vials of the wrath of God upon the earth.