Joel
Joel 2:2ASV·traditional attribution

a day of darkness and gloominess, a day of clouds and thick darkness, as the dawn spread upon the mountains; a great people and a strong; there hath not been ever the like, neither shall be any more after them, even to the years of many generations.

John Gill Reformed Baptist

A day of darkness and of gloominess, a day of clouds and of thick darkness,.... Alluding to the gloomy and thick darkness caused by the locusts, which sometimes come in prodigious numbers, like thick clouds, and darken the air; so the land of Egypt was darkened by them, Exo 10:15; historians and travellers relate, as Bochart (f) has shown, that these creatures will fly like...

Geneva Bible Notes Reformed

A day of darkness and of gloominess, a day of clouds and of thick darkness, as the morning spread upon the mountains: a great people and a strong; there hath not been ever the like, neither shall be any more after it, [even] to the years of many generations. (b) Of affliction and trouble. (c) Meaning, the Assyrians.

Jamieson-Fausset-Brown Reformed

darkness . . . gloominess . . . clouds . . . thick darkness--accumulation of synonyms, to intensify the picture of calamity (Isa 8:22). Appropriate here, as the swarms of locusts intercepting the sunlight suggested darkness as a fit image of the coming visitation.