Hadith 703
703 - حَدَّثَنَا الْحُمَيْدِيُّ قَالَ: ثنا سُفْيَانُ، قَالَ: ثنا إِسْمَاعِيلُ بْنُ أُمَيَّةَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ: أَدْرَكَ رَسُولُ اللَّهِ صَلَّي اللهُ عَلَيْهِ وَسَلَّمَ عُمَرَ وَهُوَ فِي سَفَرِهِ، وَهُوَ يَقُولُ: وَأَبِي وَأَبِي، فَقَالَ: «أَلَا إِنَّ اللَّهَ يَنْهَاكُمْ أَنْ تَحْلِفُوا بِآبَائِكُمْ، فَمَنْ كَانَ حَالِفًا فَلْيَحْلِفْ بِاللَّهِ أَوْ لِيَصْمُتْ»
Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The Noble Prophet (peace and blessings be upon him) found Sayyiduna Umar (may Allah be pleased with him) during a journey, and he was saying: "By my father! By my father!" So the Noble Prophet (peace and blessings be upon him) said: "Beware! Allah Almighty has forbidden you from swearing by your forefathers. Whoever has to swear an oath, let him swear by the name of Allah or remain silent."