أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، وَالْحَارِثُ بْنُ مِسْكِينٍ، قِرَاءَةً عَلَيْهِ وَأَنَا أَسْمَعُ، - وَاللَّفْظُ لَهُ - عَنْ سُفْيَانَ، عَنِ الزُّهْرِيِّ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ سَعْدَ بْنَ عُبَادَةَ، اسْتَفْتَى رَسُولَ اللَّهِ صلى الله عليه وسلم فِي نَذْرٍ كَانَ عَلَى أُمِّهِ تُوُفِّيَتْ قَبْلَ أَنْ تَقْضِيَهُ فَقَالَ " اقْضِهِ عَنْهَا " .
It was narrated from Ibn 'Abbas that Sa'd bin 'Ubadah asked the Messenger of Allah about a vow which his mother had sworn, but she died before she could fulfill it. He said: "Fulfill it on her behalf." Translation Not Available
Book Ref: Sunan An Nisai Book 35 Hadith 3817
Web Ref: Sunan An Nisai Vol 4 Book 35 Hadith 3848