כֹּֽה־אָמַ֞ר יְהוָ֤ה צְבָאוֹת֙ אֱלֹהֵ֣י יִשְׂרָאֵ֔ל ע֣וֹד יֹאמְר֞וּ אֶת־הַדָּבָ֣ר הַזֶּ֗ה בְּאֶ֤רֶץ יְהוּדָה֙ וּבְעָרָ֔יו בְּשׁוּבִ֖י אֶת־שְׁבוּתָ֑ם יְבָרֶכְךָ֧ יְהוָ֛ה נְוֵה־צֶ֖דֶק הַ֥ר הַקֹּֽדֶשׁ׃
Thus saith the LORD of hosts, the God of Israel: Yet again shall they use this speech In the land of Judah and in the cities thereof, When I shall turn their captivity: ‘The LORD bless thee, O habitation of righteousness, O mountain of holiness.’
Metzudat David on Jeremiah
when I return – At the time when I bring back the children of captivity to their place they will say ‘May the Lord bless You, dwelling of righteousness’ which refers to Jerusalem.