Revelation 1:4

John to the seven assemblies that are in Asia: Grace to you, and peace, from Him Who is, and Who was, and Who is coming; and from the seven Spirits Who are before His throne;

Revelation 1:20

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 seven assemblies; and the seven candlesticks are seven assemblies."

Revelation 5:1

And I saw, in the right hand of Him Who was sitting on the throne, a book written within and on the back, sealed up with seven seals.

Revelation 5:6

And I saw, in the midst of the throne and of the four living creatures, and in the midst of the elders, a Lamb standing, as if 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 great voice, as a lion roars; and, when he 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, the last, because in them was finished the wrath of God.

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 forever and ever.

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 into 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 assemblies that are in Asia: Grace to you, and peace, from Him Who is, and Who was, and Who is coming; and from the seven Spirits Who are before His throne;
Revelation 5:1
And I saw, in the right hand of Him Who was sitting on the throne, a book written within and on the back, sealed up 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 great voice, as a lion roars; and, when he 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, the last, because in them was finished the wrath of God.
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 into the earth."