Mark 11:31
And they reasoned with themselves, saying, If we shall say, From heaven; he will say, Why then did ye not believe him?
Cross-reference
Matthew 11:7–14
Parallel
Matthew 11:7-14 records Jesus' testimony that John is a prophet and Elijah, explaining why the leaders feared to deny his heavenly origin.
Matthew 21:25–27
Parallel
Matthew 21:25-27 is the parallel account of this same internal debate among the religious leaders about John's authority.
Matthew 21:31
Parallel
In Matthew 21:31, Jesus rebukes the leaders for not believing John, exposing the hypocrisy behind their reasoning in Mark 11:31.
Matthew 21:32
Parallel
Matthew 21:32 directly accuses the leaders of not believing John despite the tax collectors' repentance, revealing their true rejection of God.
John 3:27
Related theme
John 3:27 states 'a person cannot receive even one thing unless it is given him from heaven' — directly answering whether John's baptism was from heaven.