8 Their widows are increased to me above the sand of the seas: I have brought upon them against the mother of the young men a spoiler at noonday: I have caused him to fall upon it suddenly, and terrors upon the city.
(Verse 8.) Her widows are multiplied to me above the sand of the sea: I have brought upon them the destroyer at noonday: I have sent troubles suddenly upon the cities. With various medicines God desires to save sinners: so that those who despised His gentle entreaties may fear His threatening. Widows are multiplied above the sand of the sea, with men being killed; mothers, with their children being lost, have felt the destroyer, not in the night and by treachery, but in broad daylight: so that He may show the open force of a stronger adversary. He sent, he says, over the cities, no doubt with the intention of causing sudden terror to Judah, and the sinful people, so that the more sudden the disaster was, the more difficult it would be to escape.
[AD 420] Jerome on Jeremiah 15:8