The pastures are clothed with flocks; the valleys also are covered over with grain; they shout for joy, they also sing.
Read Chapter 65
Augustine of Hippo
17. "Clothed have been the rams of the sheep" (ver. 13): "with exultation" must be understood. For with what exultation the hills are encircled, with the same are clothed the rams of the sheep. Rams are the very same as hills. For hills they are because of more eminent grace; rams, because they are leaders of the flocks. ..."They shall shout:" thence they shall abound with wheat, because they shall shout. What shall they shout? "For a hymn they shall say." For one thing it is to shout against God, another thing to say a hymn; one thing to shout iniquities, another thing to shout the praises of God. If thou shout in blasphemy, thorns thou hast brought forth: if thou shoutest in a hymn, thou aboundest in wheat.
Clothed, with fleeces, (Haydock) or rather, shall be surrounded with sheep. Hebrew also, "the pastures shall be covered with sheep. "Houbigant would read e, for c, and translate, "the mountains shall be clothed with flocks. "But such changes require some proof, and the sense is the same. (Berthier)
All nature (Menochius) praises God in its own manner, when it answers the designs of God. Yet man is chiefly invited to sing. (Haydock)
The pastors, (Worthington) like rams, lead the way; but all the just, without exception, shall be happy in their celestial mansions, and with the utmost content, shall join in the hymns of Sion. (Haydock)