What the Bible says about Cut off
(From Forerunner Commentary)

Numbers 15:31 Notice these verbs: "Despise," "reproach," "cut off." There is a difference in attitude reflected in the person who sins unintentionally, even though the person is conscious of what he is doing. There is no forgiveness here. He bears his guilt right to the grave. So, murder, which involves deliberateness, is the willful taking of a life, and to sin presumptuously is to do it willfully. John W. Ritenbaugh Examples of Divine Justice Related Topics: Guilt | Murder | Presumptuous Sins | Sin, Deliberate | Sin, Willful | Willfully Sin