Messenger of Allah ﷺ came to visit me while I was sick and unconscious. He performed ablution and sprinkled the remaining water on me and I became conscious and said, "O Messenger of Allah ﷺ! To whom will my inheritance go as I have neither ascendants nor descendants?" Then the Divine verses regarding Fara'id (inheritance) were revealed.  

سَمِعْتُ جَابِرًا يَقُولُ جَاءَ رَسُولُ اللَّهِ ﷺ يَعُودُنِي وَأَنَا مَرِيضٌ لاَ أَعْقِلُ فَتَوَضَّأَ وَصَبَّ عَلَىَّ مِنْ وَضُوئِهِ فَعَقَلْتُ فَقُلْتُ يَا رَسُولَ اللَّهِ لِمَنِ الْمِيرَاثُ إِنَّمَا يَرِثُنِي كَلاَلَةٌ فَنَزَلَتْ آيَةُ الْفَرَائِضِ  

The Prophet ﷺ came to me while I was ill. He performed ablution and threw the remaining water on me (or said, "Pour it on him) " When I came to my senses I said, "O Messenger of Allah ﷺ! I have no son or father to be my heir, so how will be my inheritance?" Then the Verse of inheritance was revealed.  

دَخَلَ عَلَىَّ النَّبِيُّ ﷺ وَأَنَا مَرِيضٌ فَتَوَضَّأَ فَصَبَّ عَلَىَّ أَوْ قَالَ صُبُّوا عَلَيْهِ فَعَقَلْتُ فَقُلْتُ لاَ يَرِثُنِي إِلاَّ كَلاَلَةٌ فَكَيْفَ الْمِيرَاثُ فَنَزَلَتْ آيَةُ الْفَرَائِضِ  

[Machine] The Messenger of Allah ﷺ used to frequently perform ablution without any clear reason, so he poured water from his ablution onto me. Then he became conscious and I asked him if it meant that he was bequeathing me some inheritance. So, the verse of obligatory bequest was revealed.  

أَنَّ رَسُولَ اللهِ ﷺ عَادَهُ وَهُوَ لَا يَعْقِلُ فَتَوَضَّأَ فَصَبَّ عَلَيْهِ مِنْ وَضُوئِهِ فَعَقَلَ قُلْتُ يَرِثُنِي كَلَالَةٌ فَكَيْفَ الْمِيرَاثُ؟ فَأُنْزِلَ آيَةُ الْفَرْضِ