Revelation 9:2

Overview - Revelation 9
At the sounding of the fifth angel, a star falls from heaven, to whom is given the key to the bottomless pit.
He opens the pit, and there come forth locusts like scorpions.
12 The first woe past.
13 The sixth trumpet sounds.
14 Four angels are let loose, that were bound.
Treasury of Scripture Knowledge

Revelation 9:2  (King James Version)
And he opened the bottomless pit; and there arose a smoke out of the pit, as the smoke of a great furnace; and the sun and the air were darkened by reason of the smoke of the pit.

17 ; 14:11 Genesis 15:17 ; 19:28 Isaiah 14:31 ; Joel 2:30 ; Acts 2:19

and the sun
8:12 Exodus 10:21-23 ; Joel 2:2 Joel 2:10