They will come and sing in the height of Zion, and will flow to the goodness of Yahweh, to the grain, to the new wine, to the oil, and to the young of the flock and of the herd. Their soul will be as a watered garden. They will not sorrow any more at all.
Jeremiah 31:10 “Hear Yahweh’s word, you nations, and declare it in the distant islands. Say, ‘He who scattered Israel will gather him, and keep him, as a shepherd does his flock.’
Jeremiah 31:11 For Yahweh has ransomed Jacob, and redeemed him from the hand of him who was stronger than he.
Jeremiah 31:12 They will come and sing in the height of Zion, and will flow to the goodness of Yahweh, to the grain, to the new wine, to the oil, and to the young of the flock and of the herd. Their soul will be as a watered garden. They will not sorrow any more at all.
Jeremiah 31:13 Then the virgin will rejoice in the dance; 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.
Jeremiah 31:14 I will satiate the soul of the priests with fatness, and my people will be satisfied with my goodness,” says Yahweh.
The verse centers on "come", "sing", "height", "zion", "flow", "goodness", "yahweh", and "grain". It is saying that the verse draws attention to "come" and "sing", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 11's "For Yahweh has ransomed Jacob and redeemed..." into verse 13's "Then the virgin will rejoice in the...", so "come" and "sing" belong inside that flow. In Jeremiah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "come" and "sing" with trust shaped by these words, not by a vague optimism outside the passage.