Jamieson, Fausset and Brown on Jeremiah 9:22

22. saith the Lord--continuing the thread of discourse from Jr 9:20.

dung--(Jr 8:2).

handful ... none ... gather them--implying that the handful has been so trodden as to be not worth even the poor gleaner's effort to gather it. Or the Eastern custom may be referred to: the reaper cuts the grain and is followed by another who gathers it. This grain shall not be worth gathering. How galling to the pride of the Jews to hear that so shall their carcasses be trodden contemptuously under foot!