حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُتْبَةَ بْنِ مَسْعُودٍ، عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ، أَنَّ سَعْدَ بْنَ عُبَادَةَ، اسْتَفْتَى رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ إِنَّ أُمِّي مَاتَتْ وَعَلَيْهَا نَذْرٌ وَلَمْ تَقْضِهِ ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ اقْضِهِ عَنْهَا ‏"‏ ‏.‏

Yahya related to me from Malik from Ibn Shihab from Ubaydullahibn Abdullah ibn Utba ibn Masud from Abdullah ibn Abbas that Sad ibnUbada questioned the Messenger of Allah, may Allah bless him and granthim peace, and said,"My mother died while she still had a vow whichshe had not fulfilled." The Messenger of Allah, may Allah bless himand grant him peace, said, "Fulfill it for her." Translation Not Available

Book Ref: Muwatta Imam Malik Book 22 Hadith 1012
Web Ref:  Muwatta Imam Malik Book 22 Hadith 1