The Last Words of David, Randall Thompson

He that ruleth over men must be just, ruling in the fear of God.
And he shall be as the light of the morning, when the sun riseth, even a morning without clouds;
as the tender grass springing out of the earth by clear shining after rain.
Alleluia. Amen.

http://www.worldwideschool.org/library/books/relg/bible/theholybible/chap293.html

Samuel XXIII

23:1. Now these are David's last words. David the son of Isai said: The man to whom it was appointed concerning the Christ of the God of Jacob, the excellent psalmist of Israel said:

23:2. The spirit of the Lord hath spoken by me and his word by my tongue.

23:3. The God of Israel said to me, the strong one of Israel spoke, the ruler of men, the just ruler in the fear of God.

23:4. As the light of the morning, when the sun riseth, shineth in the morning without clouds, and as the grass springeth out of the earth by rain.

As the light, etc. . .So shall be the kingdom of Christ.