Tanach · Rishonim on Tanach · Ibn Ezra · Torah

Ibn Ezra on Exodus 21:15/אבן עזרא על שמות כ״א:ט״ו

אומכה. בעבור שהזכיר מכה איש ומת (פ' יב) הוצרך לפרש כי יש מכה בלא מיתת המוכה שימות, כמו מכה אביו, ומכה ישרת בעבור אחר, ובעבור כבוד האבות הוצרך לומר אפילו שלא יכם רק יקללם יומת:
1AND HE THAT SMITETH HIS FATHER. Since Scripture had previously mentioned, He that smiteth a man, so that he dieth, shall surely be put to death (v. 12), Scripture had to explain that there is an instance where one is put to death for smiting someone even when the one who is struck does not die. This is the case when one hits one’s father. The word u-makkeh (and he that smiteth) is to be read as if written twice.190 It was out of regard for the parents’ honor that Scripture found it necessary to state191 that even when one does not strike one’s parents but curses them, he is to be put to death.