"And of the angels he saith, Who maketh his angels spirits, and his ministers a flame of fire." Hebrews 1:7; Psalm 104:4.
"And there were seven lamps of fire burning before the throne, which are the seven Spirits of God." Rev. 4:5.
"The seven spirits which are before his throne." Rev. 1:4.
"The seven angels which stood before God." Rev. 8:2.
"Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?" Hebrews 1:14.
"Seven eyes, which are the seven Spirits of God sent forth into all the earth." Revelation 5:6.
"His eyes were as a flame of fire." Rev. 1:14; 2:18; 19:12.
"Upon one stone shall be seven eyes." Zech. 3:9.
"Behold, a candlestick all of gold, with . . . seven lamps thereon, and seven pipes to the seven lamps." Zech. 4:2.
"They are the eyes of the Lord, which run to and fro through the whole earth." Zech. 4:10.
"For the eyes of the Lord run to and fro throughout the whole earth, to shew himself strong in the behalf of them whose heart is perfect toward him." 2 Chron. 16:9 (See also Jer. 5:1).
As the "eyes of the Lord," angels are also referred to as "the watchers . . . and the holy ones." Daniel 4:13, 17.
Fallen angels are called unclean or evil spirits. God's holy angels are "spirits" as well.
Here is Ezekiel's description of one angel: "Then I beheld, and lo a likeness as the appearance of fire: from the appearance of his loins even downward, fire; and from his loins even upward, as the appearance of brightness, as the color of amber. And he put forth the form of an hand, and took me by a lock of mine head; and the spirit lifted me up between the earth and the heaven, and brought me in the visions of God to Jerusalem. . . ." Ezekiel 8:2, 3.
1 Kings 22:19-24
Acts 8:26, 29, 39
Acts 23:8, 9