John Calvin on Jeremiah 48:31

Some think the last word to be a proper name, though, according to etymology, it is “the city of potsherd.” They therefore give this rendering, “the strong city.” But Isaiah calls it “Kir-hareseth,” קיר-הרשת; he extends the word by adding a syllable to it; but the word, however, is the same. Then he says, I will think of the men of Kir-cheres The word הגה, ege, is properly to complain, to whisper, to murmur; and hence some render the words not improperly, “I will mutter to the men of the city of potsherd.” This paragraph has been transplanted from the text.

The verbs here are imperatives in the Sept and Syr., “Howl ye,” etc.; and in the future tense in the Targ., “they shall howl, etc. The Vulg., is according to the Hebrew. The last verb is in the third person, “He (Moab) will mourn for the men of Kir-heres.” This city was on the extremity of Moab northward, as Jazer was on its extremity southward. — Ed.

The Prophet does not relate here what he would do, as I have before reminded you; but that he might represent to the life the ruin of Moab, he mentions their howling, crying, and complaints. He then says, I will howl, cry aloud, and with a trembling voice complain, as those who are grievously oppressed with evils; at one time they complain, cry aloud, and howl, and at another they mutter inwardly, grumble and murmur. Thus the Prophet assumes the character of such persons, in order that he might more fully set forth the extreme calamity of that nation. He afterwards comes to particulars: —

Jeremiah 48:32

32. O vine of Sibmah, I will weep for thee with the weeping of Jazer: thy plants are gone over the sea, they reach even to the sea of Jazer: the spoiler is fallen upon thy summer-fruits and upon thy vintage.

32. A fletu Jaezer flebo (vel, a planctu plangam) tibi (id est, super to) vitis Sibmah; propagines tuae penetrarunt ultra mare (trajecerunt mare,) usque ad mare Jaezer (hoc est, cives Jaezer, vel propagines) attigerunt; super aestivales (vel, aestivos) fructus tuos (vel, messes proprie,) et super vindemias tuas irruit vastator.