Charles Ellicott Commentary Jeremiah 31:12-14

"And they shall come and sing in the height of Zion, and shall flow unto the goodness of Jehovah, to the grain, and to the new wine, and to the oil, and to the young of the flock and of the herd: and their soul shall be as a watered garden; and they shall not sorrow any more at all. Then shall the virgin rejoice in the dance, and the young men and the old together; for I will turn their mourning into joy, and will comfort them, and make them rejoice from their sorrow. And I will satiate the soul of the priests with fatness, and my people shall be satisfied with my goodness, saith Jehovah." — Jeremiah 31:12-14 (ASV)

Therefore they shall come and sing ... — The vision of return culminates in a picture of the prosperity of the restored kingdom. The “goodness of the Lord” is, as in Hosea 3:5, the attribute on which the prophets love to dwell, as shown in all forms of outward abundance. The picture, always among the brightest an Eastern mind can draw, of a “watered garden” (Isaiah 58:11; Genesis 13:10) should be only the symbol of the continuous joy and freshness of their life.

The dances of joy, as in the days of Miriam (Exodus 15:20), and Jephthah (Judges 11:34), and David (1 Samuel 18:6), should take the place of lamentation. It will be noticed that in all these instances, the dancing company consists of women only. Sacrifices should be offered in the thankfulness of a prosperous people, beyond the utmost expectations of the priests, who had the right of eating of the victims’ flesh. Young and old, priests and laity, should rejoice together.