[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."
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»