Commentaries
149:1-5 New mercies continually demand new songs of praise, upon earth and in heaven. And the children of Zion have not only to bless the God who made them, but to rejoice in him, as having created them in Christ Jesus unto good works, and formed them saints as well as men. The Lord takes pleasure in his people; they should rejoice in Him. When the Lord has made sinners feel their wants and unworthiness, he will adorn them with the graces of his Spirit, and cause them to bear his image, and rejoice in his happiness for ever. Let his saints employ their waking hours upon their beds in songs of praise. Let them rejoice, even upon the bed of death, assured that they are going to eternal rest and glory.
2. God had signalized His relation as a sovereign, in restoring them to their land.