And I will give her her vineyards from thence, and the valley of Achor for a door of hope: and she shall sing there, as in the days of her youth, and as in the day when she came up out of the land of Egypt.
And I will give her vineyards from thence - "from thence," when I shall cause her to return from the wilderness. The wilderness itself shall become a fruitful field (Isaiah 32:15). The solitude of the wilderness shall be the means of her regaining her vineyards in her restored inheritance. God gives Israel a fresh grant of Canaan, which she had forfeited; so He promises a renewed grant hereafter (Hosea 2:21-22) of her vineyards, which He is now about to "take away" from her (Hosea 2:9; Hosea 2:12).
And the valley of Achor for a door of hope. "Achor" - i:e., Trouble. As formerly Israel, after their tedious journey through the wilderness, met with the trouble resulting from Achan's crime in this valley, on the very threshold of Canaan, and yet that trouble was presently turned into joy at the great victory at Ai which threw all Canaan into their hands (Joshua 7:1-26; Joshua 8:1-35); so the very trouble of Israel's wilderness-state will be the "door of hope" opening to better days. The valley of Achor, near Jericho was specially fruitful (Isaiah 65:10); so "trouble" and "hope" are rightly blended in connection with it. "Hope:" the word, more fully means 'a patient enduring, longing' (Pusey).
She shall sing there, as in the days of her youth, and as in the day when she came up out of ... Egypt - it shall be a second exodussong, such as Israel sung after the deliverance at the Red Sea (Exodus 15:1-27: cf. Isaiah 11:15-16); and "the song of Moses" (Revelation 15:2-3), about to be sung by those who through the Lamb overcome the beast, and so stand on the sea of glass mingled with fire, emblems of fiery trial, such as that of Israel at the Red Sea.
There - in "the wilderness," and "in the valley of trouble" (Achor), where God "spake comfortably" to her.
When she came up. When God's people leave the world for Him they are said to go up to God and to heavenly things.