Passage
Thou shalt again plant vineyards upon the mountains of Samaria; the planters shall plant, and shall eat the fruit.
Thou shalt again plant vineyards upon the mountains of Samaria; the planters shall plant, and shall eat the fruit.
Jeremiah 31:3 Jehovah hath appeared from afar unto me, [saying,] Yea, I have loved thee with an everlasting love; therefore with loving-kindness have I drawn thee.
Jeremiah 31:4 I will build thee again, and thou shalt be built, O virgin of Israel! Thou shalt again be adorned with thy tambours, and shalt go forth in the dances of them that make merry.
Jeremiah 31:5 Thou shalt again plant vineyards upon the mountains of Samaria; the planters shall plant, and shall eat the fruit.
Jeremiah 31:6 For there shall be a day, when the watchmen upon mount Ephraim shall cry, Arise, and let us go up to Zion, unto Jehovah our God.
Jeremiah 31:7 For thus saith Jehovah: Sing aloud [with] gladness for Jacob, and shout at the head of the nations; publish ye, praise ye, and say, Jehovah, save thy people, the remnant of Israel.
The verse centers on "thou", "shalt", "again", "plant", "vineyards", "upon", "mountains", and "samaria". It is saying that the verse draws attention to "thou" and "shalt", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 4's "I will build thee again and thou..." into verse 6's "For there shall be a day when...", so "thou" and "shalt" 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 "thou" and "shalt" with trust shaped by these words, not by a vague optimism outside the passage.