וּרְאִיתֶם֙ וְשָׂ֣שׂ לִבְּכֶ֔ם וְעַצְמוֹתֵיכֶ֖ם כַּדֶּ֣שֶׁא תִפְרַ֑חְנָה וְנוֹדְעָ֤ה יַד־יְהוָה֙ אֶת־עֲבָדָ֔יו וְזָעַ֖ם אֶת־אֹיְבָֽיו׃
你們看見了，心中就必快樂；你們的骨頭必如嫩草一般滋長茂盛。永恆者的手必向祂的僕人彰顯，祂也必向祂的仇敵發怒。
Rashi
and the hand of the Lord shall be known When He wreaks His vengeance and His awesome acts, His servants shall know the strength of the might of His hand.
Ibn Ezra
Your heart The soul is meant, which has its principal seat in the heart.23Comp. I. E. on Gen. 1:1, where more instances of similar kinds of metonymy are given.
Ibn Ezra
And your bones. The principal constituents of the human frame.24The Hebrew text has the words כי הם המוסדות (lit., for they are the fundamental parts), which, on account of the plural form, cannot be meant as an explanation of לבבכם, but as that of עצמותיכם; the words רמז לגוף; the body is meant, must perhaps be supplied together with ועצמותיכם, for the phrase כי הם המוסרות contains the reason for some preceding explanation.