Jeremiah 3:23 - Matthew Poole's English Annotations on the Holy Bible

From the hills, i.e. either from their idols, which were worshipped upon hills, a metonymy of the subject, Jeremiah 2:20, idols of the hills; or from any other external power whatsoever, either of persons or things, as the strength of hills, or forts, high places, and strong places, and assistance from kings, Hosea 14:3. The multitude of mountains, viz, the abundance of them that they have in their mountains, or the multitude of sacrifices which they offer in the mountains, or to multiply sacrifices. Quest. But doth not the psalmist hope for salvation from the hills? Psalms 121:1. Answ. Yes, the hills of the Land of Promise, which were a pledge of God's favour to his people, especially those two of Zion and Moriah, where God did peculiarly manifest his presence, Psa 87. In the Lord our God is the salvation of Israel; or, our salvation which we do now acknowledge is only in our God, and not in idols, of which we have had ample experience, Psalms 44:7, Psalms 130:7,8. See Isaiah 43:10,11 Ho 13:4,9.