“Set up road markers for yourself; make yourself guideposts; consider well the highway, the road by which you went. Return, O virgin Israel, return to these your cities.
He describes what mercy would do, even that God would at length restore the captives and bring them back from exile to their own country. There was however mention made previously of his favor, that we may know that the people were restored for no other reason but because God had mercy on them.
We have here, I. Ephraim's repentance, and return to God. Not only Judah, but Ephraim the ten tribes, shall be restored, and therefore shall thus be prepared and qualified for it, Hos 14:8. Ephraim shall say, What have I do to any more with idols?
Commenting on Jeremiah 31:18-26
Set thee up way marks, make thee high heaps,.... Of stones, raised up as pillars, or like pyramids; or upright, as palm trees, which signification the word (z) has; to be marks and signs, to know the way again upon a return.