Exodus 21:15

"And he that smiteth his father, or his mother, shall be surely put to death."

Cross References (ranked by relevance)

The eye that mocketh at his father, and despiseth to obey his mother, the ravens of the valley shall pick it out, and the young eagles shall eat it.

Proverbs 30:11

There is a generation that curseth their father, and doth not bless their mother.

1 Timothy 1:9

Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,

Deuteronomy 27:24

Cursed be he that smiteth his neighbour secretly. And all the people shall say, Amen.