Irenaeus

The parable of the two sons also: those who are sent into the vineyard, of whom one indeed opposed his father, but afterwards repented, when repentance profited him nothing; the other, however, promised to go, at once assuring his father, but he did not go (for "every man is a liar;" "to will is present with him, but he finds not means to perform"),-[this parable, I say], points out one and the same Father.