Church Fathers on Luke 15:31

While the Scribes and Pharisees were murmuring about His receiving sinners, our Savior put three parables to them successively. In the two first He hints at the joy He has with the angels in the salvation of penitents. But in the third He not only declares His own joy and that of His angels, but He also blames the murmurings of those who were envious. For He says, Now his elder son was in the field.

The elder son is the people of Israel, not indeed gone into a distant country, yet not in the house, but in the field, that is, in the paternal wealth of the Law and the Prophets, choosing to work earthly things. But coming from the field he began to draw nigh to the house, that is, the labor of his servile works being condemned by the same Scriptures, he was looking upon the liberty of the Church. Whence it follows; And as he came and drew nigh to the house, he heard music…

But the younger son, that is the Gentile people, is envied by Israel as the elder brother, the privilege of his father’s blessing. Which the Jews did because Christ sat down to meat with the Gentiles, as it follows; And he was angry, and would not go in, &c.