Jamieson, Fausset and Brown on Isaiah 24:16

16. Songs to God come in together to Palestine from distant lands, as a grand chorus.

glory to the righteous--the burden of the songs (Is 26:2, 7). Amidst exile, the loss of their temple, and all that is dear to man, their confidence in God is unshaken. These songs recall the joy of other times and draw from Jerusalem in her present calamities, the cry, "My leanness." Horsley translates, "glory to the Just One"; then My leanness expresses his sense of man's corruption, which led the Jews, "the treacherous dealers" (Jr 5:11), to crucify the Just One; and his deficiency of righteousness which made him need to be clothed with the righteousness of the Just One (Psa 106:15).

treacherous dealers--the foreign nations that oppress Jerusalem, and overcome it by stratagem (so in Is 21:2) [Barnes].