Pensée juive sur Les Psaumes 128:6

Abundance of lovingkindness, as in: “like the dew of the Hermon that descends on the mountains of Zion” [Ps. 133:3]. The “dew of the Hermon” refers to the attribute of lovingkindness. Abundance of mercy, for God builds Jerusalem with mercy, as is written: “Who, in his mercy, builds Jerusalem” [see Blessing after meal]. Abundance of goodness, as is written: “and see the goodness of Jerusalem” [Ps. 128:5], and “this good mountain and the Lebanon” [Ps. 128:6]. All of the above are the assignment of Mashiach ben Yosef, because Zion is in line with Yosef according to the Midrash mentioned above. As long as Zion is desolate, a spirit of impurity prevails and places obstacles preventing the passage of abundance from above. Only building Jerusalem can strengthen the connection as it states:“built-up Jerusalem is like a city united together” [Ps. 122:3].