From his father (Ibn 'Umar) that the Prophet (ﷺ) heard 'Umar saying: "By my father, By my father!" So he said: "Verily Allah prohibits you from swearing by your father." So 'Umar said: "By Allah I did not swear by him after that, neither intentionally nor in narrating."
Reference: Jami` at-Tirmidhi 1533 In-book : Book 20, Hadith 11 English translation : Vol. 3, Book 18, Hadith 1533
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