Matthew Poole and continuators on Psalms 132:9

9 Let thy priests be cloathed with righteousness ▪ and let thy saints shout for joy .

Not onely with those outward Sacerdotal garments of glory and beauty which thou hast appointed for them, but especially with those inward ornaments of righteousness and true holiness, that so their persons and services may be accepted by thee both for themselves and for all thy people, and they may be cloathed with salvation, as it is expressed here below v. 16. and 2 Chron. 6. 41. which is the effect or consequent of the former clothing.

Let all thy people have cause of rejoycing in the tokens of thy goodness▪ which they eminently had at the dedication of the Temple, as is noted 1 Kings 8. 66.

Marginal references: Ver. 16.