Haydock Catholic Bible Commentary
Alleluia. The psalm turns on God's praises, and might be composed by David, after he had settled the order of the Levites, though it may suit all people. (Berthier) --- The latter part agrees with Psalm xciii., and Jeremias x., which might lead us to conclude that it was composed after the captivity perhaps for the dedication of the second temple. The next psalm is a repetition of this, with the chorus interspersed. (Calmet)
Courts. Both clergy and laity praise God for his favours and power. (Worthington)
PSALM CXXXIV. (LAUDATE NOMEN.)
An exhortation to praise God: the vanity of idols.
Sweet. Occupation, and very useful, Psalm cxlvi. 1. (Calmet)