24 Jesus said to them, "I will also ask you one thing, which if you tell Me, I will also tell you by what authority I do these things.
25 The baptism of John was from what source, from heaven or from men?" And they began reasoning among themselves, saying, "If we say, 'From heaven,' He will say to us, 'Then why did you not believe him?'
26 But if we say, 'From men,' we fear the people; for they all regard John as a prophet."
27 And answering Jesus, they said, "We do not know." He also said to them, "Neither will I tell you by what authority I do these things.
28 "But what do you think? A man had two sons, and he came to the first and said, 'Son, go work today in the vineyard.'
29 And he answered, 'I will not'; but afterward he regretted it and went.
30 The man came to the second and said the same thing; and he answered, 'I will, sir'; but he did not go.