Revelation 1:4

JOHN to the seven churches which are in Asia: favour and peace be with you from him WHO IS, WHO WAS, WHO WILL BE; and from the seven spirits who are before his throne;

Revelation 1:20

the conceal'd meaning of the seven stars which you saw in my right hand, and of the seven golden candlesticks, is this: the seven stars signify the angels of the seven churches: and the seven candlesticks which you saw, signify the seven churches.

Revelation 5:1

And I saw in the right hand of him that sate on the throne, A BOOK written within and on the backside, sealed with seven SEALS.

Revelation 5:6

And I beheld, and saw before the throne, in the midst of the four animals, and in the midst of the elders, a lamb which seem'd to have been slain, having seven horns, and seven eyes, which are the seven spirits of God sent forth into all the earth.

Revelation 8:2

Then I saw the seven angels who attend in the presence of God; and to them were given seven trumpets.

Revelation 8:6

Then the seven angels who had the seven trumpets, prepared themselves to sound.

Revelation 10:3

his voice was as loud as the roaring of a lion: and when he had cried, seven thunders uttered their voices.

Revelation 15:1

I saw another prodigy in heaven, great and marvellous, SEVEN ANGELS, having the seven last plagues, for by them the divine vengeance is consummated.

Revelation 15:7

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

Revelation 16:1

THEN I heard a terrible voice from the temple, crying to the seven angels, "go pour out the VIALS of divine vengeance 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: favour and peace be with you from him WHO IS, WHO WAS, WHO WILL BE; and from the seven spirits who are before his throne;
Revelation 5:1
And I saw in the right hand of him that sate on the throne, A BOOK written within and on the backside, sealed with seven SEALS.
Revelation 8:2
Then I saw the seven angels who attend in the presence of God; and to them were given seven trumpets.
Revelation 10:3
his voice was as loud as the roaring of a lion: and when he had cried, seven thunders uttered their voices.
Revelation 15:1
I saw another prodigy in heaven, great and marvellous, SEVEN ANGELS, having the seven last plagues, for by them the divine vengeance is consummated.
Revelation 16:1
THEN I heard a terrible voice from the temple, crying to the seven angels, "go pour out the VIALS of divine vengeance upon the earth."