Leviticus 20:9
Anyone who curses their father or mother is to be put to death. Because they have cursed their father or mother, their blood will be on their own head. The death penalty for cursing parents addresses the violation of the parental honor command of Leviticus 19:3 and the Fifth Commandment. Matthew 15:4 records Jesus citing this verse when confronting the Pharisees who used corban to avoid supporting their parents. The their blood will be on their own head formula communicates that the death penalty is just: the violator bears responsibility for the consequence.