Here's Bruckner's Os Justi sung by the Windsbacher Knabenchor
Os justi meditabitur sapientiam, et lingua ejus loquetur judicium. Lex Dei ejus in corde ipsius: et non supplantabuntur gressus ejus. Alleluia.
The mouth of the righteous utters wisdom, and his tongue speaks what is just. The law of his God is in his heart; and his feet do not falter. Alleluia
And, here's the Regensburger Domspatzen choir singing it.