Unbelief was an Impediment to the Performance of Miracles
Source: TTT
Matthew 17:20
“Because you have so little faith,” He answered. “For truly I tell you, if you have faith the size of a mustard seed, you can say to this mountain, ‘Move from here to there,’ and it will move. Nothing will be impossible for you.”
Mark 6:5
So He could not perform any miracles there, except to lay His hands on a few of the sick and heal them.