Exodus 21:17

ומקלל אביו ואמו WHOSOEVER CURSETH HIS FATHER OR HIS MOTHER [SHALL SURELY BE PUT TO DEATH] — Why is this stated in this particular form? Since Scripture says, (Leviticus 20:9) “For every man who execrateth his father [or his mother shall surely be put to death]” I might say that I have here only the law that a man who curseth his father or his mother is punishable with death. Whence do I know that this is also the case if a woman curseth her father or her mother? Scripture therefore states here, “Whosoever curseth father or mother” — whosoever generally — intimating that it applies to both man and woman (Mekhilta). But if this be so why is it said, (Leviticus 20:9). “For every man who execrateth etc.”? To exclude a minor. מות יומת SHALL SURELY BE PUT TO DEATH — by stoning. And the rule is that wherever the term “his blood is upon him “is used in connection with the death penalty, “execution by stoning” is meant. The following in the passage from which this is evident (בנין אב): (Leviticus 20:27) “they shall overwhelm them with stones: their blood is upon them” — and as regards one who curses father or mother (Leviticus 20:9), Scripture indeed uses the words דמיו בו (Mekhilta; Sanhedrin 66a).

וּמְקַלֵּ֥ל אָבִ֛יו וְאִמּ֖וֹ מ֥וֹת יוּמָֽת׃ {ס}        

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