There were 5 major Philistine cities (1Sa 6:17; Josh 13:3),
but in later days the prophets carefully leave Gath out of the picture (Amo
1:6-8; Zep 2:4; Jer 25:20; Zec 9:5,6). Why? Uzziah, in his war against the
Philistines, smashed up Gath, Jabneh and Ashdod (2Ch 26:6). The last of these
was evidently strategic enough to warrant rebuilding (Isa 20:1), but the other
two disappeared from history -- and from prophecy also.
FOREIGN: Heb "ereb" = "mixed", with special ref to Arab
peoples (see Lesson, Arab/"mixed"). Also in v 20.
SHESHACH: A cryptogram for "Babel", or Babylon. The
method used is a simple code in which each letter is replaced by its counterpart
marked off from the other end of the alphabet. Thus, in English, BAD becomes
YZW. (The same code is used in Jer 51:1,41 also.)