1. Leviticus 20:9 (ESV)
  2. Exposition

What is the punishment for such a violation of the law?

Leviticus 20:9 (ESV)

9 For anyone who curses his father or his mother shall surely be put to death; he has cursed his father or his mother; his blood is upon him.

The penalty for cursing one’s parents is death. The same punishment is found in Exodus 21:17.