Jeremiah 47:5

Both Gaza and Ashkelon were two principal cities belonging to the Philistines taken by Judah, Judges 1:18; we read of them 1 Samuel 6:17; both Amos, Zephaniah, and Zechariah prophesied their ruin, Amos 1:8 Zephaniah 2:4,7 Zec 9:5, as well as this prophet. By the remnant of their valley, most understand those who lived in the valleys near about Ashkelon. Concerning the last clause in this verse there is some difference, whether the words should be joined with the next verse, and read, how long wilt thou cut thyself, O thou sword of the Lord? or as they lie in our Bibles; and then the sense is, Why will you in so desperate a case afflict yourselves, when all your mourning will do you no good.