Revelation 1:4

John to the seven churches which are in Asia: Grace to you, and peace, from the one who is, and who was, and who is coming; and from the seven Spirits which are before his throne;

Revelation 1:20

and the mystery of the seven stars which you saw in my right hand, and the seven golden candlesticks. The seven stars are the angels of the seven churches: and the seven golden candlesticks are the seven churches.

Revelation 5:1

And I saw upon the right hand of the one sitting upon the throne a book having been written within and without, having been sealed with seven seals.

Revelation 5:6

And I saw, in the midst of the throne and the four living creatures, and in the midst of the elders, the Lamb standing as having been slain, having seven horns and seven eyes, which are the seven Spirits of God having been sent into all the earth.

Revelation 8:2

And I saw the seven angels who stood before God; and seven trumpets were given unto them.

Revelation 8:6

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

Revelation 10:3

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

Revelation 15:1

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

Revelation 15:7

And one of the four living creatures gave to the seven angels seven golden bowls full of the wrath of God who liveth unto the ages of the ages.

Revelation 16:1

And I heard a great voice out of the temple saying to the seven angels, Go and pour out the seven bowls 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 to you, and peace, from the one who is, and who was, and who is coming; and from the seven Spirits which are before his throne;
Revelation 5:1
And I saw upon the right hand of the one sitting upon the throne a book having been written within and without, having been sealed with seven seals.
Revelation 8:2
And I saw the seven angels who stood before God; and seven trumpets were given unto them.
Revelation 10:3
and he cried with a loud voice, as a lion roars. And when he cried the seven thunders uttered their voices.
Revelation 15:1
And I saw another sign in the heaven, great and wonderful, seven angels having the seven last plagues; that in them the wrath of God is finished.
Revelation 16:1
And I heard a great voice out of the temple saying to the seven angels, Go and pour out the seven bowls of the wrath of God upon the earth.