Charles H. Spurgeon on Psalms 134:3

The LORD that made heaven and earth bless thee out of Zion. He doth not say, the Lord that made the earth bless thee out of heaven; nor, the Lord that made heaven bless thee out of heaven; but "bless thee out of Zion." As if he would teach us that all blessings come as immediately and primarily from heaven, so mediately and secondarily from Zion, where the Temple stood. If ever, therefore, we would have blessings outward, inward, private, public, secular, spiritual; if ever we would have blessing in our estate, blessing in our land, blessing in our souls, we must pray for it, and pray for it here, in Zion, in God's house: for from the piety there exercised all blessings flow, as from a fountain that can never be drawn dry. —Abraham Wright.