Kommentar zu Tehillim 135:21

Blessed is the Lord from Zion- Because there in Jerusalem the glory dwells and from there instruction goes out to all, that they should fear Him and bless Him and honor Him:

Blessed is the Lord from Zion – Blessing arises from Zion, and according to the merit of Zion it descends into the world, because He dwells in Jerusalem and watches over all the actions of the people within it, to bless them according to their actions and their sacred service.