Behold the slain. The prophet foresaw the desolate state of the land because of the Babylonian captivity.
Sick with famine. That is, suffering from the diseases brought by famine, such as malnutritional ailments and other physical weaknesses that spring from the lack of food.
Go about. Or, “make merchandise.” The meaning of this clause is somewhat obscure. Some think the passage means that the prophet and the priest would wander around in the land of captivity not knowing where to dwell or where they would be taken next. Others believe that it means that these false religious leaders would gain no lesson from the severe experience of the Exile, but would continue to ply their trade during their captivity.