Hadith 4
The Book of Oaths and Vows
Yahya bin Abi Ishaq said:
"A man from Banu Ghifar told me, in the gathering of Salim bin 'Abdullah, Salim bin 'Abdullah said: 'I heard 'Abdullah -that is, Ibn 'Umar- say: "The Messenger of Allah said: 'Allah forbids you to swear by your forefathers.'"'"
أَخْبَرَنِي زِيَادُ بْنُ أَيُّوبَ، قَالَ حَدَّثَنَا ابْنُ عُلَيَّةَ، قَالَ حَدَّثَنَا يَحْيَى بْنُ أَبِي إِسْحَاقَ، قَالَ حَدَّثَنِي رَجُلٌ، مِنْ بَنِي غِفَارٍ فِي مَجْلِسِ سَالِمِ بْنِ عَبْدِ اللَّهِ قَالَ سَالِمُ بْنُ عَبْدِ اللَّهِ سَمِعْتُ عَبْدَ اللَّهِ، - يَعْنِي ابْنَ عُمَرَ - وَهُوَ يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم
إِنَّ اللَّهَ يَنْهَاكُمْ أَنْ تَحْلِفُوا بِآبَائِكُمْ
Hadith gradings, numbering and translations can differ between editions. For legal rulings or detailed interpretation, consult qualified scholarship and the referenced edition.