35 Thus says Yahweh, who gives the sun for a light by day, and the ordinances of the moon and of the stars for a light by night, who stirs up the sea, so that its waves roar; Yahweh of Armies is his name: 36 If these ordinances depart from before me, says Yahweh, then the seed of Israel also shall cease from being a nation before me forever. 37 Thus says Yahweh: If heaven above can be measured, and the foundations of the earth searched out beneath, then will I also cast off all the seed of Israel for all that they have done, says Yahweh. 38 Behold, the days come, says Yahweh, that the city shall be built to Yahweh from the tower of Hananel to the gate of the corner. 39 The measuring line shall go out further straight onward to the hill Gareb, and shall turn about to Goah. 40 The whole valley of the dead bodies and of the ashes, and all the fields to the brook Kidron, to the corner of the horse gate toward the east, shall be holy to Yahweh; it shall not be plucked up, nor thrown down any more forever.

Matthew Henry's Commentary on Jeremiah 31:35-40

Commentary on Jeremiah 31:35-40

(Read Jeremiah 31:35-40)

As surely as the heavenly bodies will continue their settled course, according to the will of their Creator, to the end of time, and as the raging sea obeys him, so surely will the Jews be continued a separate people. Words can scarcely set forth more strongly the restoration of Israel. The rebuilding of Jerusalem, and its enlargement and establishment, shall be an earnest of the great things God will do for the gospel church. The personal happiness of every true believer, as well as the future restoration of Israel, is secured by promise, covenant, and oath. This Divine love passes knowledge; and to those who take hold upon it, every present mercy is an earnest of salvation.