15 Heb “you have forgotten” (so , , ).
16 Heb “and the rocky cliff of your strength you do not remember.”
17 Heb “a vine, a strange one.” The substantival adjective זָר (zar) functions here as an appositional genitive. It could refer to a cultic plant of some type, associated with a pagan rite. But it is more likely that it refers to an exotic, or imported, type of vine, one that is foreign (i.e., “strange”) to Israel.
18 Heb “in the day of your planting you [?].” The precise meaning of the verb תְּשַׂגְשֵׂגִי (tésagsegi) is unclear. It is sometimes derived from שׂוּג/סוּג (sug, “to fence in”; see 691 II סוּג). In this case one could translate “you build a protective fence.” However, the parallelism is tighter if one derives the form from שָׂגָא/שָׂגָה (saga’/sagah, “to grow”); see J. N. Oswalt, Isaiah (), 1:, n. 4. For this verb, see 960 שָׂגָא.
19 The Hebrew text has, “a heap of harvest.” However, better sense is achieved if נֵד (ned, “heap”) is emended to a verb. Options include נַד (nad, Qal perfect third masculine singular from נָדַד [nadad, “flee, depart”]), נָדַד (Qal perfect third masculine singular from נָדַד), נֹדֵד (noded, Qal active participle from נָדַד), and נָד (nad, Qal perfect third masculine singular, or participle masculine singular, from נוּד [nud, “wander, flutter”]). See 626 נוּד and I נדד. One could translate literally: “[the harvest] departs,” or “[the harvest] flies away.”

In other versions

ESVEnglish Standard Version

For you have forgotten the God of your salvation

and have not remembered the Rock of your refuge;

therefore, though you plant pleasant plants

and sow the vine-branch of a stranger,

though you make them grow on the day that you plant them,

and make them blossom in the morning that you sow,

yet the harvest will flee away

in a day of grief and incurable pain.

NIVNew International Version (2011)

You have forgotten God your Savior;

you have not remembered the Rock, your fortress.

Therefore, though you set out the finest plants

and plant imported vines,

though on the day you set them out, you make them grow,

and on the morning when you plant them, you bring them to bud,

yet the harvest will be as nothing

in the day of disease and incurable pain.

CSBChristian Standard Bible

For you have forgotten the God of your salvation,

and you have failed to remember

the rock of your strength;

therefore you will plant beautiful plants

and set out cuttings from exotic vines.

On the day that you plant,

you will help them to grow,

and in the morning

you will help your seed to sprout,

but the harvest will vanish

on the day of disease and incurable pain.

NLTNew Living Translation

Why? Because you have turned from the God who can save you.

You have forgotten the Rock who can hide you.

So you may plant the finest grapevines

and import the most expensive seedlings.

They may sprout on the day you set them out;

yes, they may blossom on the very morning you plant them,

but you will never pick any grapes from them.

Your only harvest will be a load of grief and unrelieved pain.

LEBThe Lexham English Bible

For you have forgotten the God of your salvation,

and you have not remembered the rock of your refuge;

therefore you plant plants of pleasantness,

and you plant a vine of a foreigner.

On your planting day you make them grow,

and in the morning of your sowing you bring them into bloom,

yet the harvest will flee in a day of sickness and incurable pain.

KJV 1900King James Version

Because thou hast forgotten the God of thy salvation,

And hast not been mindful of the rock of thy strength,

Therefore shalt thou plant pleasant plants,

And shalt set it with strange slips:

In the day shalt thou make thy plant to grow,

And in the morning shalt thou make thy seed to flourish:

But the harvest shall be a heap in the day of grief and of desperate sorrow.

Public Domain