Revelation 4:5-6

Young's Literal Translation

⁵ and out of the throne proceed do lightnings, and thunders, and voices; and seven lamps of fire are burning before the throne, which are the Seven Spirits of God,

⁶ and before the throne [is] a sea of glass like to crystal, and in the midst of the throne, and round the throne, [are] four living creatures, full of eyes before and behind;