וְהָיָ֗ה בְּי֨וֹם הָנִ֤יחַ יְהוָה֙ לְךָ֔ מֵֽעָצְבְּךָ֖ וּמֵרָגְזֶ֑ךָ וּמִן־הָעֲבֹדָ֥ה הַקָּשָׁ֖ה אֲשֶׁ֥ר עֻבַּד־בָּֽךְ׃
Y será en el día que SEÑOR te diera reposo de tu trabajo, y de tu temor, y de la dura servidumbre en que te hicieron servir,
Rashi on Isaiah
on the day the Lord allows you to rest Scripture is addressing Israel.
Ibn Ezra on Isaiah
מעצבך From thy hardship. Judah is addressed. מעצבך from thy hardship refers to the sufferings of the body, מרגזך from thy trouble to those of the heart.1This distinction between עצב and רנז can only refer to the relative meaning of these two words, when following each other; but עצב by itself is used also for the trouble of the heart and soul; comp. Gen. 45:5, 1 Sam. 20:34. A. V, From thy sorrow and from thy fear.
Rashi on Isaiah
from your sorrow and from your shuddering which the king of Babylon saddened you and caused you to shudder, and when you see his downfall, you will be eased, since you will go out free.