'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 name that you live, and are dead.

And out of the throne came lightnings and thunderings and voices. And seven lamps of fire were burning in front of the throne, which are the seven spirits of God.

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