"Busrah bint Safwan told me that." 'Urwah sent someone to check that, and she said: "The Messenger of Allah ﷺ mentioned what Wudu' is done for, and said: 'Touching the penis.'"
مَرْوَانُ أَخْبَرَتْنِيهِ بُسْرَةُ بِنْتُ صَفْوَانَ فَأَرْسَلَ عُرْوَةُ قَالَتْ ذَكَرَ رَسُولُ اللَّهِ ﷺ مَا يُتَوَضَّأُ مِنْهُ فَقَالَ مِنْ مَسِّ الذَّكَرِ
"I entered upon Mawan bin Al-Hakam and we mentioned the things for which Wudu' is done. Marwan said: 'Wudu' should be done after touching the penis.' 'Urwah said: 'I did not know that.' Marwan said: 'Busrah bint Safwan told me that she heard the Messenger of Allah ﷺ say: "And if any one of you touches his penis, let him do Wudu'."
مَرْوَانُ مِنْ مَسِّ الذَّكَرِ الْوُضُوءُ فَقَالَ عُرْوَةُ مَا عَلِمْتُ ذَلِكَ فَقَالَ مَرْوَانُ أَخْبَرَتْنِي بُسْرَةُ بِنْتُ صَفْوَانَ أَنَّهَا سَمِعَتْ رَسُولَ اللَّهِ ﷺ يَقُولُ إِذَا مَسَّ أَحَدُكُمْ ذَكَرَهُ فَلْيَتَوَضَّأْ
[Machine] He said that wudu' includes washing the private parts, and Uruwah disagreed with that. Marwan mentioned that Busrah, the daughter of Safwan, informed him about it, so he sent a message to Busrah asking her about it. She said, "The Prophet ﷺ mentioned what should be washed during wudu', and he mentioned washing the private parts."
أَنَّهُ قَالَ الْوُضُوءُ مِنْ مَسِّ الذَّكَرِ فَأَنْكَرَ ذَلِكَ عُرْوَةَ فَقَالَ مَرْوَانُ أَخْبَرَتْنِيهِ بُسْرَةُ بِنْتُ صَفْوَانَ فَأَرْسَلَ إِلَى بُسْرَةَ فَقَالَتْ «ذَكَرَ رَسُولُ اللهِ ﷺ مَا يُتَوَضَّأْ مِنْهُ؟ فَذَكَرَ مَسَّ الذَّكَرِ»