Revelation 1:4

John to the seven churches which are in Asia: Grace be to you, and peace, 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

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 are the seven churches.

Revelation 5:1

And I saw in the right hand of him that sat on the throne a book written within and without, sealed fast with seven seals.

Revelation 5:6

And I saw, between the throne and the four living creatures and the elders, a Lamb standing, as if 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 who stand before God; and there were given to them seven trumpets.

Revelation 8:6

And the seven angels who had the seven trumpets prepared themselves to sound.

Revelation 10:3

and he cried with a loud voice, as a lion roars. And when he had cried, the seven thunders uttered their voices.

Revelation 15:1

And I saw another sign in heaven, great and marvelous seven angels, having seven plagues, which are the last, because in them is completed the wrath of God.

Revelation 15:7

And one of the four living creatures 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 loud voice out of the temple, saying to the seven angels, Go, and pour out the seven 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 which are in Asia: Grace be to you, and peace, 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 in the right hand of him that sat on the throne a book written within and without, sealed fast with seven seals.
Revelation 8:2
And I saw the seven angels who stand before God; and there were given to them seven trumpets.
Revelation 10:3
and he cried with a loud voice, as a lion roars. And when he had cried, the seven thunders uttered their voices.
Revelation 15:1
And I saw another sign in heaven, great and marvelous seven angels, having seven plagues, which are the last, because in them is completed the wrath of God.
Revelation 16:1
And I heard a loud voice out of the temple, saying to the seven angels, Go, and pour out the seven vials of the wrath of God upon the earth.