حَدَّثَنَا عَبْدُ الْأَعْلَى عَنْ مَعْمَرٍ عَنِ الزُّهْرِيِّ عَنْ سَالِمٍ عَنْ أَبِيهِ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ سَمِعَ عُمَرَ وَهُوَ يَقُولُ وَأَبِي فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّ اللَّهَ يَنْهَاكُمْ أَنْ تَحْلِفُوا بِآبَائِكُمْ فَإِذَا حَلَفَ أَحَدُكُمْ فَلْيَحْلِفْ بِاللَّهِ أَوْ لِيَصْمُتْ قَالَ عُمَرُ فَمَا حَلَفْتُ بِهَا بَعْدُ ذَاكِرًا وَلَا آثِرًا
مسند امام احمد بن حنبل · Hadith 4523
It was narrated from Saalim, from his father, that the Prophet (PBUH) heard 'Umar saying, my father. The Messenger of Allah (PBUH) said: "Verily, Allah forbids you to swear by your fathers. If one of you want to swear an oath, let him swear by Allah or keep silent." 'Umar said: after that, I never swore by them whether on my own behalf or narrating it from someone else."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020