Matthew
Matthew 20:10BSB·traditional attribution

So when the original workers came, they assumed they would receive more. But each of them also received a denarius.

John Gill Reformed Baptist @doctorgill

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.

Albert Barnes Presbyterian @notesbybarnes

Verse 10. They supposed that they should have received more. They had worked longer; they had been in the heat; they supposed that it was his intention to pay them, not according to contract, but according to the time of the labour.

Jamieson-Fausset-Brown Reformed @jfbcommentary

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.