Charles Ellicott Commentary Jeremiah 47:7

"How canst thou be quiet, seeing Jehovah hath given thee a charge? Against Ashkelon, and against the sea-shore, there hath he appointed it." — Jeremiah 47:7 (ASV)

Against the sea shore. —In the “sea shore,” as in Ezekiel 25:16, we have the term specially appropriate to the territory of the Philistines.