Matthew Poole and continuators on Jeremiah 17:6

6 For he shall be like the heath in the desert, and shall not see when good cometh, but shall inhabit the parched places in the wilderness, in a salt land and not inhabited .

The sum is he shall not thrive, nor prosper but be like the Heath, by which is meant some barren Shrub or Tree, about which the various guesses of Interpreters (which the Reader that is curious may find in the English Annotations) are but incertainties, and this planted in the Wilderness too which is a barren soil, which Tree or Plant is never the better for all the moisture that comes from Heaven, nor for all the beams of the Sun; but stands in a dry and salt place, not inhabited by people. The scope is to let us know, that sinners who depart from God, and do not place their confidence in him in times of danger, but trust in creature aids and assistances, shall miss of those very good things which they might have had if they had expected them from him, from whom alone they could have been obtained.

Marginal references: chap. 48.6.