Jeremiah 47

4. every helper--The Philistines, being neighbors to the Phoenicians of Tyre and Sidon, would naturally make common cause with them in the case of invasion. These cities would have no helper left when the Philistines should be destroyed.
Caphtor--the Caphtorim and Philistines both came from Mizraim ( Genesis 10:13 Genesis 10:14 ). The Philistines are said to have been delivered by God from Caphtor ( Amos 9:7 ). Perhaps before the time of Moses they dwelt near and were subjugated by the Caphtorim ( Deuteronomy 2:23 ) and subsequently delivered. "The remnant" means here those still left after the Egyptians had attacked Gaza and Palestine; or rather, those left of the Caphtorim after the Chaldeans had attacked them previous to their attack on the Philistines. Some identify Caphtor with Cappadocia; GESENIUS, with Crete ( Ezekiel 25:16 , Cherethims); KITTO, Cyprus. Between Palestine and Idumea there was a city Caparorsa; and their close connection with Palestine on the one hand, and Egypt (Mizraim, Genesis 10:13 Genesis 10:14 ) on the other hand, makes this locality the most likely.

5. Baldness . . . cut thyself--Palestine is represented as a female who has torn off her hair and cut her flesh, the heathenish ( Leviticus 19:28 ) token of mourning ( Jeremiah 48:37 ).
their valley--the long strip of low plain occupied by the Philistines along the Mediterranean, west of the mountains of Judea. The Septuagint reads Anakim, the remains of whom were settled in those regions ( Numbers 13:28 ). Joshua dislodged them so that none were left but in Gaza, Gath, and Ashdod ( Joshua 11:21 Joshua 11:22 ). But the parallel ( Jeremiah 47:7 ), "Ashkelon . . . the sea-shore," established English Version here, "Ashkelon . . . their valley."

6. Jeremiah, in the person of the Philistines afflicting themselves ( Jeremiah 47:5 ), apostrophizes the "sword of the Lord," entreating mercy (compare Deuteronomy 32:41 , Ezekiel 21:3-5 Ezekiel 21:9 Ezekiel 21:10 ).
up thyself--Hebrew, "Gather thyself," that is, retire or return.

7. Jeremiah, from addressing the sword in the second person, turns to his hearers and speaks of it in the third person.
Lord . . . given it a charge--( Ezekiel 14:17 ).
the sea-shore--the strip of land between the mountains and Mediterranean, held by the Philistines: "their valley"
there hath he appointed it--( Micah 6:9 ). There hath He ordered it to rage.