Leviticus 20:9

Overview - Leviticus 20
Of him that gives of his seed to Moloch.
Of him that favours such an one.
Of going to wizards.
Of sanctification.
Of him that curses his parents.
10 Of adultery.
11 Of incest.
13 Of sodomy.
15 Of bestiality.
18 Of uncleanness.
22 Obedience is required with holiness.
27 Wizards must be put to death.
Treasury of Scripture Knowledge

Leviticus 20:9  (King James Version)
For every one that curseth his father or his mother shall be surely put to death: he hath cursed his father or his mother; his blood shall be upon him.

The term {yekallel} signifies not only to curse, but to speak contemptuously, disrespectfully, or to make light of a person: so that all speeches which have a tendency to lessen our parents in the eyes of others, or to render their judgment, piety, etc., suspected or contemptible, is here included; though the act of cursing, or of treating the parent with injurious or opprobrious language, is what is particularly intended. He who conscientiously keeps the fifth commandment, can be in no danger of the judgment here denounced.
Exodus 21:17 ; Deuteronomy 27:16 ; Proverbs 20:20 ; Proverbs 30:11 Proverbs 30:17 Matthew 15:4 ; Mark 7:10

his blood
Leviticus 20:11-13 Leviticus 20:16 Leviticus 20:27 ; Joshua 2:19 ; Judges 9:24 ; 2 Samuel 1:16 ; 1 Kings 2:32 ; Matthew 27:25