Mark:11:30-32
rsv@Mark:11:30 @ And they argued with one another, "If we say, `From heaven,' he will say, `Why then did you not believe him?'
rsv@Mark:11:31 @ But shall we say, `From men'?"--they were afraid of the people, for all held that John was a real prophet.
rsv@Mark:11:32 @ So they answered Jesus, "We do not know." And Jesus said to them, "Neither will I tell you by what authority I do these things."