Matthew
Matthew 21:30ESV·traditional attribution

And he went to the other son and said the same. And he answered, ‘I will, sir,’ but did not go.

John Calvin Reformed @genevareformer

30. I, Sir. “Seigneur, j’y vay;” — “Sir, I go to it.” This phrase is borrowed from the Hebrew language; for, when the Hebrews wish to offer their services, and to declare that they are ready to obey, they speak in this manner, “Here I am, Sir,” It is a laudable virtue in itself, as soon as God has spoken, to yield to Him ready...

John Gill Reformed Baptist @doctorgill

And he came to the second,.... The Scribes and Pharisees, by the ministry of John the Baptist, Christ, and his apostles also: and said likewise; the same things as to the other son, the publicans and sinners; calling them into the Gospel dispensation, to hear the word, embrace truth, attend on ordinances, and labour in promoting the kingdom, and interest of the Messiah, whilst they...

Jamieson-Fausset-Brown Reformed @jfbcommentary

And he came to the second, and said likewise. And he answered and said, I go, sir--"I, sir." The emphatic "I," here, denotes the self-righteous complacency which says, "God, I thank thee that I am not as other men" (Luk 18:11). and went not--He did not "afterward repent" and refuse to go; for there was here no intention to go.