וּפְדוּיֵ֨י יְהוָ֜ה יְשֻׁב֗וּן וּבָ֤אוּ צִיּוֹן֙ בְּרִנָּ֔ה וְשִׂמְחַ֥ת עוֹלָ֖ם עַל־רֹאשָׁ֑ם שָׂשׂ֤וֹן וְשִׂמְחָה֙ יַשִּׂ֔יגוּ וְנָ֖סוּ יָג֥וֹן וַאֲנָחָֽה׃ (פ)
און די דערלײזטע פֿון גאָט װעלן צוריקקערן, און װעלן קומען קײן צִיון מיט געזאַנג, און אַן אײביקע שִׂמחה װעט זײַן אױף זײער קאָפּ; שָׂשׂון-וּשִׂמחה װעט זײ אָניאָגן, און אַנטלױפֿן װעלן טרױער און זיפֿצעניש.
Rashi
with joy of days of yore (Heb. שִׂמְחַתעוֹלָם, joy that is from days of yore, which they already experienced on the way of their Exodus from Egypt, “and the Lord was going before them by day” (Ex. 13:21).
Ibn Ezra
And the ransomed, etc. And those that return, will come to Zion with rejoicing and with everlasting joy upon their heads. The head is the principal seat of the soul.11The divine promise of joy and happiness concerns the soul more than the body. According to others the joy will be like a cover over their heads; this explanation is also admissible.