'Seven Spirits of God' in the Bible

And to the angel of the church in Sardis write; These things saith he that hath the seven Spirits of God, and the seven stars; I know thy works, that thou hast a name, that thou livest, and art dead.

And out of the throne proceeded lightnings 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 beings, and in the midst of the elders stood a Lamb as it had been slain, having seven horns, and seven eyes, which are the seven Spirits of God sent forth into all the earth.