Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tabarani:12329Aḥmad b. Dāwud al-Makkī > ʿAmr b. Marzūq > Shuʿbah > al-Aʿmash > Muslim al-Baṭīn > Saʿīd b. Jubayr > Ibn ʿAbbās

[Machine] That a woman came to the Prophet ﷺ and mentioned to him that her sister had made a vow to fast for a month, but she passed away before being able to fast. The Messenger of Allah ﷺ said, "I will fast on behalf of your sister."  

الطبراني:١٢٣٢٩حَدَّثَنَا أَحْمَدُ بْنُ دَاوُدَ الْمَكِّيُّ ثنا عَمْرُو بْنُ مَرْزُوقٍ أنا شُعْبَةُ عَنِ الْأَعْمَشِ عَنْ مُسْلِمٍ الْبَطِينِ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ

أَنَّ امْرَأَةً أَتَتِ النَّبِيَّ ﷺ فَذَكَرَتْ لَهُ أَنَّ أُخْتَهَا نَذَرَتْ أَنْ تَصُومَ شَهْرًا وَأَنَّهَا رَكِبَتِ الْبَحْرَ فَمَاتَتْ وَلَمْ تَصُمْ فَقَالَ رَسُولُ اللهِ ﷺ «صَوْمِي عَنْ أُخْتِكِ»  


See similar narrations below:

Collected by Bayhaqī
bayhaqi:8226Abū Bakr Muḥammad b. al-Ḥasan b. Fūrak > ʿAbdullāh b. Jaʿfar > Yūnus b. Ḥabīb > Abū Dāwud > Shuʿbah > al-Aʿmash > Muslim al-Baṭīn > Saʿīd b. Jubayr > Ibn ʿAbbās

[Machine] A woman came to the Prophet ﷺ and informed him that her sister had made a vow to fast for a month, but she died before being able to fulfill it because she had embarked on a sea voyage. The Prophet ﷺ then told her, "I will fast on behalf of your sister." This statement indicates that the Prophet ﷺ granted permission to fast on behalf of another person, just as she had intended.  

البيهقي:٨٢٢٦كَمَا أَخْبَرَنَا أَبُو بَكْرٍ مُحَمَّدُ بْنُ الْحَسَنِ بْنِ فُورَكٍ أنبأ عَبْدُ اللهِ بْنُ جَعْفَرٍ ثنا يُونُسُ بْنُ حَبِيبٍ ثنا أَبُو دَاوُدَ ثنا شُعْبَةُ عَنِ الْأَعْمَشِ قَالَ سَمِعْتُ مُسْلِمًا الْبَطِينَ يُحَدِّثُ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ

أَنَّ امْرَأَةً أَتَتِ النَّبِيَّ ﷺ فَذَكَرَتْ لَهُ أَنَّ أُخْتَهَا نَذَرَتْ أَنْ تَصُومَ شَهْرًا وَأَنَّهَا رَكِبَتِ الْبَحْرَ فَمَاتَتْ وَلَمْ تَصُمْ فَقَالَ لَهَا رَسُولُ اللهِ ﷺ صُوْمِي عَنْ أُخْتِكِ فَهَذَا اللَّفْظُ نَصٌّ فِي الصَّوْمِ عَنْهَا وَكَذَلِكَ  

رَوَاهُ زَيْدُ بْنُ أَبِي أُنَيْسَةَ عَنِ الْحَكَمِ بْنِ عُتَيْبَةَ عَنْ سَعِيدِ بْنِ جُبَيْرٍ إِلَّا أَنَّهُ قَالَ إِنَّ أُمِّي مَاتَتْ