John Gills Exposition of the Bible Commentary - Joel 2:5
Like the noise of chariots on the tops of that mountains shall they leap ,.... The motion of the locusts is leaping from place to place; for which the locusts have legs peculiarly made, their hindermost being the longest; wherefore Pliny F9 Nat. Hist. l. 11. c. 48. observes, that insects which have their hindermost legs long leap locusts; to which agrees the Scripture description of them: "which have legs above their feet, to leap withal upon the earth; even those of them ye may eat;... read more
Matthew Henry's Complete Commentary - Joel 2:1-11
Here we have God contending with his own professing people for their sins and executing upon them the judgment written in the law (Deut. 28:42), The fruit of thy land shall the locust consume, which was one of those diseases of Egypt that God would bring upon them, Deut. 28:60. I. Here is the war proclaimed (Joel 2:1): Blow the trumpet in Zion, either to call the invading army together, and then the trumpet sounds a charge, or rather to give notice to Judah and Jerusalem of the approach of the... read more