Revelation 1:4

John to the seven churches which are in Asia; Grace be unto you, and peace from him who is, and who was, and who cometh, and from the seven Spirits that are before the throne,

Revelation 1:20

The mystery of the stars which thou sawest in my right hand and of the seven golden candlesticks. The stars are angels of the churches: and the candlesticks are seven churches.

Revelation 5:1

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

Revelation 5:6

And I beheld in the midst of the throne and of the four living creatures, and in the midst of the elders, a Lamb standing as if he 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 which stand before God, and seven trumpets were given them.

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 when a lion roareth; and while he 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 by them the wrath of God is fulfilled.

Revelation 15:7

And one of the four living creatures gave the seven angels seven golden phials full of the wrath of God, who liveth for ever.

Revelation 16:1

And I heard a loud voice out of the temple, saying to the seven angels, Go, pour out the seven phials 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 unto you, and peace from him who is, and who was, and who cometh, and from the seven Spirits that are before the throne,
Revelation 5:1
And I saw in the right-hand of him that sat upon the throne a book written within and without, sealed with seven seals.
Revelation 8:2
And I saw the seven angels which stand before God, and seven trumpets were given them.
Revelation 10:3
And he cried with a loud voice, as when a lion roareth; and while he 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 by them the wrath of God is fulfilled.
Revelation 16:1
And I heard a loud voice out of the temple, saying to the seven angels, Go, pour out the seven phials of the wrath of God upon the earth.