Albert Barnes Commentary Jeremiah 15:8

"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 destroyer at noonday: I have caused anguish and terrors to fall upon her suddenly." — Jeremiah 15:8 (ASV)

This translates as: I have brought upon them, even upon the mother of the young man, a spoiler, and so on. The word translated as “young man” means an elite warrior. The mother has borne a valiant champion, but neither his prowess nor the numerous offspring of the other can avail to save those who gave them birth; war bereaves both equally.

At noonday - that is, unexpectedly, as armies used to rest at noon (see the note on Jeremiah 6:4).

I have caused him ... - Rather, I have brought suddenly upon her (that is, the mother of the young warrior) anguish and terrors.