Let thy priests be clothed with righteousness - This is also substantially the same language that was used by Solomon at the dedication of the temple. See again 2 Chronicles 6:41. The idea is, that in the service of such a God, the priests, the ministers of religion, should be holy. The honor of religion demanded it. It was the first qualification of those who “served the altar;” a qualification without which all other endowments would be valueless. On the word clothed, see the notes at Psalms 35:26; compare Psalms 65:13; Psalms 93:1; Psalms 104:1; Isaiah 61:10; 1 Peter 5:5.
And let thy saints shout for joy - Thy holy ones; all who truly worship and honor thee. Let them be happy in such a God; in thy presence; in thy service. The fact that there is a God, and such a God, and that this God is ours - that we may serve him, glorify him, enjoy him - is suited to fill the mind with joy.