'Seven Spirits of God' in the Bible

"And to the angel of the church in Sardis write: "He who has the seven Spirits of God, and the seven stars says these things: "I know your works, that you have a reputation of being alive, but you are dead.

Out of the throne proceed lightnings, sounds, and thunders. There were seven lamps of fire burning before the throne, which are the seven Spirits of God.

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 though it had been slain, having seven horns, and seven eyes, which are the seven Spirits of God, sent out into all the earth.