Exodus 21:15

Overview - Exodus 21
Laws for men servants.
For the servant whose ear is bored.
For women servants.
12 For manslaughter.
16 For stealers of men.
17 For cursers of parents.
18 For smiters.
22 For a hurt by chance.
28 For an ox that gores.
33 For him that is an occasion of harm.
Treasury of Scripture Knowledge

Exodus 21:15  (King James Version)
And he that smiteth his father, or his mother, shall be surely put to death.

To smite either father or mother, in a manner which indicated either contempt or malice, or left marks of violence, was deemed a proof of so ungrateful and unnatural a disposition, that no provocation was admitted as an excuse, but the offence was made capital: nay, he who cursed his father or mother, who uttered imprecations, ill wishes, or revilings, against a parent, was included in the same sense; though few crimes were made capital by the law of Moses. The law of God, as delegated to parents is honoured when they are honoured, and despised when they are despised: and to rebel against the lawful exercise of this authority is rebellion against God
--Rev. T. Scott
Deuteronomy 21:18-21 ; 27:24 Proverbs 30:11 Proverbs 30:17 ; 1 Timothy 1:9