I consider this subject spiritually. For the building of Jerusalem is peculiarly the office of Christ. When the Lord promises to lift up an ensign to the people, it evidently refers to Christ. See those scriptures, Isaiah 11:12; whence Christ saith, John 12:32; hence also that sweet promise, Isaiah 27:13; and hence, if we accept this divine Psalm in this spiritual illustration of it all that follows may be interpreted with reference to Christ.
Related Commentaries of Psalms 147:1
Psalms 147:1-4
1 Praise ye the LORD: for it is good to sing praises unto our God; for it is pleasant; and praise is comely.
2 The LORD doth build up Jerusalem: he gathereth together the outcasts of Israel.
3 He healeth the broken in heart, and bindeth up their wounds.a
4 He telleth the number of the stars; he calleth them all by their names.