24 Jesus answered them, “I will also ask you one question. If you answer me then I will also tell you by what authority I do these things.
25 Where did John’s baptism come from? From heaven or from people?” They discussed this among themselves, saying, “If we say, ‘From heaven,’ he will say, ‘Then why did you not believe him?’
26 But if we say, ‘From people,’ we fear the crowd, for they all consider John to be a prophet.”
27 So they answered Jesus, “We don’t know.” Then he said to them, “Neither will I tell you by what authority I am doing these things.
28 “What do you think? A man had two sons. He went to the first and said, ‘Son, go and work in the vineyard today.’
29 The boy answered, ‘I will not.’ But later he had a change of heart and went.
30 The father went to the other son and said the same thing. This boy answered, ‘I will, sir,’ but did not go.