Matthew 3:12

whose winnowing-shovel is in his hand, and he will thoroughly cleanse his thrashing-floor, and gather his grain into his granary; but the chaff he will burn with unquenchable fire.

Matthew 8:12

but the sons of the kingdom shall be cast into the darkness that is without. There shall be weeping and gnashing of teeth.

Jude 1:13

raging waves of the sea, foaming up their own shame: wandering stars, for whom the blackness of darkness is reserved forever.

Treasury of Scripture Knowledge

Summary

All darkness shall be hid in his secret places: a fire not blown shall consume him; it shall go ill with him that is left in his tabernacle.

A fire

Bible References

Darkness

Matthew 8:12
but the sons of the kingdom shall be cast into the darkness that is without. There shall be weeping and gnashing of teeth.
Jude 1:13
raging waves of the sea, foaming up their own shame: wandering stars, for whom the blackness of darkness is reserved forever.

A fire

Matthew 3:12
whose winnowing-shovel is in his hand, and he will thoroughly cleanse his thrashing-floor, and gather his grain into his granary; but the chaff he will burn with unquenchable fire.