Thy congregation hath dwelt therein - In the land of promise; for the connection requires us to understand it in this manner. The idea of the writer all along pertains to that land, and to the mercy which God had shown to it. After showing by an historical reference what God had done for the people in the wilderness, he returns here, though without expressly mentioning it, to the land of promise, and to what God had done there for his people. The word tendered “congregation” - חיה châyâh - means properly a beast, an animal, Genesis 1:30; Genesis 2:19; Genesis 8:19; Genesis 37:20. Then it comes to be used as a collective noun, meaning a herd or flock; thus, a troop of people, an array or host, 2 Samuel 23:11, 2 Samuel 23:13; and it is applied here to the people, under the idea so common in the Scriptures that God is a Shepherd.
Thou, O God, hast prepared of thy goodness for the poor - For thy flock considered as poor or wretched. That is, Thou hast provided for them when they had no resources of their own - when they were a poor, oppressed, and afflicted people - wanderers wholly dependent on thee.