Mark 6:6; Mark 9:24; Mark 16:14

Mark 6:6

6 And He wondered at their unbelief. And He was going around the villages teaching.

Mark 9:24

24 Immediately the boy's father cried out and said, "I do believe; help my unbelief."

Mark 16:14

14 Afterward He appeared to the eleven themselves as they were reclining at the table; and He reproached them for their unbelief and hardness of heart, because they had not believed those who had seen Him after He had risen.