31 They discussed it among themselves and said, “If we say, ‘From heaven,’ he will ask, ‘Then why didn’t you believe him?’

Read Mark 11:31 Using Other Translations

And they reasoned with themselves, saying, If we shall say, From heaven; he will say, Why then did ye not believe him?
And they discussed it with one another, saying, "If we say, 'From heaven,' he will say, 'Why then did you not believe him?'
They talked it over among themselves. “If we say it was from heaven, he will ask why we didn’t believe John.