حَدَّثَنَا مُحَمَّدُ بْنُ أَبِي عُمَرَ الْعَدَنِيُّ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ بْنِ عُمَرَ، عَنْ أَبِيهِ، عَنْ عُمَرَ بْنِ الْخَطَّابِ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ سَمِعَهُ يَحْلِفُ بِأَبِيهِ فَقَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " إِنَّ اللَّهَ يَنْهَاكُمْ أَنْ تَحْلِفُوا بِآبَائِكُمْ " . قَالَ عُمَرُ فَمَا حَلَفْتُ بِهَا ذَاكِرًا وَلاَ آثِرًا .
It was narrated from Salim bin 'Abdullah bin 'Umar, from his father, from 'Umar, that : the Messenger of Allah (PBUH) heard him swearing by his father. The Messenger of Allah (PBUH) said: 'Allah forbids you from making oaths by your forefathers." 'Umar said: I never took an oath by them (i.e., my forefathers) myself nor narrating such words from anyone else.” Translation Not Available
Book Ref: Sunan Ibn Majah Book 11 Hadith 2094
Web Ref: Sunan Ibn Majah Vol 3 Book 11 Hadith 2094