Jamieson, Fausset and Brown on Ezekiel 24:6

6. scum--not ordinary, but poisonous scum, that is, the people's all-pervading wickedness.

bring it out piece by piece--"it," the contents of the pot; its flesh, that is, "I will destroy the people of the city, not all at the same time, but by a series of successive attacks." Not as Fairbairn, "on its every piece let it (the poisonous scum) go forth."

let no lot fall upon it--that is, no lot, such as is sometimes cast, to decide who are to be destroyed and who saved (2Sa 8:2; Joe 3:3; Ob 11; Na 3:10). In former carryings away of captives, lots were cast to settle who were to go, and who to stay, but now all alike are to be cast out without distinction of rank, age, or sex.