Now will (a) I sing to my (b) wellbeloved a song of my beloved concerning his vineyard. My wellbeloved hath a (c) vineyard in a very fruitful hill:
(a) The prophet by this song sets before the people's eyes their ingratitude and God's mercy.
(b) That is, to God.
(c) Meaning that he had planted his Church in a place most plentiful and abundant.