Mark 6:5–6
5 And he could do no mighty work there, except that he laid his hands on a few sick people and healed them. 6 And he marveled because of their unbelief.
And he went about among the villages teaching.
Matthew 17:20
20 He said to them, “Because of your little faith. For truly, I say to you, if you have faith like a grain of mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move, and tnothing will be impossible for you.”1