Matthew 21:21

21:21 Jesus answered them, “I tell you the truth, if you have faith and do not doubt, not only will you do what was done to the fig tree, but even if you say to this mountain, ‘Be lifted up and thrown into the sea,’ it will happen.

Matthew 21:32

21:32 For John came to you in the way of righteousness, and you did not believe him. But the tax collectors and prostitutes did believe. Although you saw this, you did not later change your minds and believe him.