Matthew 3:12

His winnowing-shovel is in His hand, and He will make a thorough clearance of His threshing-floor, gathering His wheat into the storehouse, but burning up the chaff in unquenchable fire."

2 Thessalonians 1:7-9

and to requite with rest you who are suffering affliction now--rest with us at the re-appearing of the Lord Jesus from Heaven, attended by His mighty angels.

Hebrews 12:29

For our God is also a consuming fire.

Revelation 21:23

Nor has the city any need of the sun or of the moon, to give it light; for the glory of God has shone upon it and its lamp is the Lamb.

Revelation 22:5

And there will be no night there; and they have no need of lamplight or sunlight, for the Lord God will shine upon them, and they will be kings until the Ages of the Ages."

Treasury of Scripture Knowledge

Summary

And the light of Israel shall be for a fire, and his Holy One for a flame: and it shall burn and devour his thorns and his briers in one day;

Bible References

The light

Revelation 21:23
Nor has the city any need of the sun or of the moon, to give it light; for the glory of God has shone upon it and its lamp is the Lamb.
Revelation 22:5
And there will be no night there; and they have no need of lamplight or sunlight, for the Lord God will shine upon them, and they will be kings until the Ages of the Ages."

For a flame

Matthew 3:12
His winnowing-shovel is in His hand, and He will make a thorough clearance of His threshing-floor, gathering His wheat into the storehouse, but burning up the chaff in unquenchable fire."
2 Thessalonians 1:7
and to requite with rest you who are suffering affliction now--rest with us at the re-appearing of the Lord Jesus from Heaven, attended by His mighty angels.
Hebrews 12:29
For our God is also a consuming fire.