And when they had received it,.... The external privileges of the Gospel dispensation, an inheritance among them that are sanctified, and a right unto it, on the foot of free grace,

they murmured against the good man of the house; who had been so kind and liberal, to those who came last into the vineyard, and had done no injury to them, but gave them a full reward. So the Jews that first believed in Christ, were at first uneasy at the Gospel being preached to the Gentiles, at the calling of them, and their partaking of the same privileges in a Gospel church state with them, without submitting to the ceremonies of the law, as they had done; just as the Pharisees, in Christ's time, murmured against him; for receiving sinners, and eating with them: though in the latter day, the envy of Ephraim shall depart, and in the ultimate glory there will be no murmuring at each other's happiness.

But when the first came, they supposed that they should have received more--This is that calculating, mercenary spirit which had peeped out--though perhaps very slightly--in Peter's question (Mat 19:27), and which this parable was designed once for all to put down among the servants of Christ.