Luke 20:3-7

3And he answering said to them, I also will ask you [one] thing, and tell me:

4The baptism of John, was it of heaven or of men?

5And they reasoned among themselves, saying, If we should say, Of heaven, he will say, Why have ye not believed him?

6but if we should say, Of men, the whole people will stone us, for they are persuaded that John was a prophet.

7And they answered, they did not know whence.