See note Psa. 104:351a. Psalms 146—150 each begin and end with the word Hallelujah. These five psalms may be considered the consummate praises, corresponding with the praises at the end of Revelation (Rev. 19:1-6). Psalm 146 concerns the praising of Jehovah for His reigning from Zion (v. 10).
In the Septuagint there are superscriptions which indicate that Psalms 146—148 were written by Haggai and Zechariah. This would have been after their return from captivity. The return of God’s people from captivity was a great release and restoration (see Ezra and Nehemiah).