Albert Barnes Commentary Jeremiah 15:9

"She that hath borne seven languisheth; she hath given up the ghost; her sun is gone down while it was yet day; she hath been put to shame and confounded: and the residue of them will I deliver to the sword before their enemies, saith Jehovah." — Jeremiah 15:9 (ASV)

She has been ashamed - Or, “is ashamed.” To a Hebrew mother, to be childless was a disgrace. Many consider that (Jeremiah 15:7–9) refer to the battle of Megiddo and depict the consternation of Jerusalem at that sad event. If so, in the sun going down while it was day, there will be a reference to the eclipse on September 30, 610 B.C.