'Seven Spirits of God' in the Bible

And by the messenger of the congregation in Sardis, write: These things says he who has the seven spirits of God, and the seven stars: I know your works, that you have a name that you live, but are dead.

And out of the throne there came lightnings, and thunders, and voices. And seven lamps of fire were burning before the throne, which are the seven Spirits of God.

And I beheld, in the middle space, between the throne and the four living creatures, and in the midst of the elders, there stood a Lamb, which seemed to have been slain, having seven horns, and seven eyes; these are the seven Spirits of God, sent forth into all the earth.