'Seven Spirits of God' in the Bible

And to the angel of the assembly in Sardis write: These things saith he that has 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 go forth lightnings, and voices, and thunders; and seven lamps of fire, burning before the throne, which are the seven Spirits of God;

And 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 slain, having seven horns and seven eyes, which are the seven Spirits of God which are sent into all the earth: