Keil & Delitzsch, on Ps 133:3

“May the Lord out of Sion bless thee, he that made heaven and earth.”

“Calling thus up to the Temple-hill, the church receives from above the benedictory counter-greeting: Jahve bless thee out of Zion (as in Psa 128:5), the Creator of heaven and earth (as in Psa 115:15; Psa 121:2; Psa 124:8). From the time of Num 6:24 jebaréchja is the ground-form of the priestly benediction. It is addressed to the church as one person, and to each individual in this united, unit-like church.”

Imported from an open dataset — not yet checked against the printed edition.