عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا أَنَّ امْرَأَةً رَكِبَتِ الْبَحْرَ فَنَذَرَتْ إِنِ اللَّهُ تَبَارَكَ وَتَعَالَى أَنْجَاهَا أَنْ تَصُومَ شَهْرًا فَأَنْجَاهَا اللَّهُ عَزَّ وَجَلَّ فَلَمْ تَصُمْ حَتَّى مَاتَتْ فَجَاءَتْ قَرَابَةٌ لَهَا إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَذَكَرَتْ لَهُ ذَلِكَ فَقَالَ صُومِي
It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that a woman undertook a sea journey and made a vow that if Allah Almighty saved her from this journey, she would fast for a month. When Allah Almighty granted her safety, she had not yet observed the fasts when she passed away. A female relative of hers came to the Messenger of Allah (peace and blessings be upon him) and related the entire incident. The Prophet (peace and blessings be upon him) said: Fast on her behalf.