The land is full of adulterers - Of idolaters. Of persons who break their faith to ME, as an impure wife does to her husband.
The pleasant places of the wilderness are dried up - He speaks here, most probably, in reference to dearth. Profane oaths, false swearing, evil courses, violence, etc., had provoked God to send this among other judgments; see Jeremiah 23:19.
Because of swearing - Rather, because of the curse denounced against sin Jeremiah 11:3. The mourning probably refers to the drought Jeremiah 12:4.
The pleasant places - “Pastures.”
Their course - Their mode of life.
Their force is not right - “Their heroism,” that on which they pride themselves as mighty men, “is not right,” is wrong (see Jeremiah 8:6 note).