Then began he to speak to the people this parable;
A certain man planted a vineyard, and let it out to tenants, and went into a far country for a long time.
All Commentaries on Luke 20:9 Go To Luke 20
Augustine of Hippo
AD 430
Matthew has omitted for brevity's sake what Luke has not; namely, that the parable was spoken not to the rulers only who asked concerning His authority, but also to the people.
Or else, in the multitude of which we are speaking there were those who craftily asked our Lord by what authority He acted; there were those also who not craftily, but faithfully, cried aloud, Blessed is he who comes in the name of the Lord. And so there wouldbe some who would say, He will miserably destroy those husbandmen, and let out his vineyard to others. Which are rightly said to have been the words of our Lord Himself, either on account of their truth, or because of the unity of the members with the head; while there would be others also who would say to those who made this answer, God forbid, inasmuch as they understood the parable was spoken against themselves. It follows, And he beheld them, and said, What is this then that is written, The stone which the builders rejected, the same is become the head of the corner?