'Seven Spirits of God' in the Bible

And unto the angel of the church in Sardis write; These things says he that has the seven Spirits of God, and the seven stars; I know your works, that you have a name that you live, and are dead.

And out of the throne proceeded lightning and thunderings and voices: and there were seven lamps of fire burning before the throne, which are the seven Spirits of God.

And I beheld, and, lo, in the midst of the throne and of the four living creatures, and in the midst of the elders, stood a Lamb as though it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth.