Observe when the Lord threatens punishment, he still speaks of his mountain and his people. Israel and Judah are still the Lord's, though chastened with the chastisement of a man. Jeremiah 31:20.
Related Commentaries of Jeremiah 17:3
Jeremiah 17:3-4
3 O my mountain in the field, I will give thy substance and all thy treasures to the spoil, and thy high places for sin, throughout all thy borders.
4 And thou, even thyself, shalt discontinueb from thine heritage that I gave thee; and I will cause thee to serve thine enemies in the land which thou knowest not: for ye have kindled a fire in mine anger, which shall burn for ever.