But last of all he sent unto them his son, saying, They will reverence my son.

People's New Testament

21:37 Last of all he sent unto them his son. This was the last and crowning effort of divine mercy; after which, on the one side, all the resources, even of heavenly love, are exhausted; on the other, the measure of sins is perfectly filled up.

Jamieson-Fausset-Brown Bible Commentary

37. But last of all he sent unto them his son, saying, They will reverence my son-In Mark (Mr 12:6) this is most touchingly expressed: "Having yet therefore one son, His well-beloved, He sent Him also last unto them, saying, They will reverence My Son." Luke's version of it too (Lu 20:13) is striking: "Then said the lord of the vineyard, What shall I do? I will send My beloved Son: it may be they will reverence Him when they see Him." Who does not see that our Lord here severs Himself, by the sharpest line of demarcation, from all merely human messengers, and claims for Himself Sonship in its loftiest sense? (Compare Heb 3:3-6). The expression, "It may be they will reverence My Son," is designed to teach the almost unimaginable guilt of not reverentially welcoming God's Son.

Matthew Henry's Concise Commentary

21:33-46 This parable plainly sets forth the sin and ruin of the Jewish nation; and what is spoken to convict them, is spoken to caution all that enjoy the privileges of the outward church. As men treat God's people, they would treat Christ himself, if he were with them. How can we, if faithful to his cause, expect a favourable reception from a wicked world, or from ungodly professors of Christianity! And let us ask ourselves, whether we who have the vineyard and all its advantages, render fruits in due season, as a people, as a family, or as separate persons. Our Saviour, in his question, declares that the Lord of the vineyard will come, and when he comes he will surely destroy the wicked. The chief priests and the elders were the builders, and they would not admit his doctrine or laws; they threw him aside as a despised stone. But he who was rejected by the Jews, was embraced by the Gentiles. Christ knows who will bring forth gospel fruits in the use of gospel means. The unbelief of sinners will be their ruin. But God has many ways of restraining the remainders of wrath, as he has of making that which breaks out redound to his praise. May Christ become more and more precious to our souls, as the firm Foundation and Cornerstone of his church. May we be willing to follow him, though despised and hated for his sake.