He witnessed me rubbing off the semen from the clothe of the Messenger of Allah ﷺ. Abu Dawud said: Al-A'mash narrated it as narrated by al-Hakam.
أَنَّهُ كَانَ عِنْدَ عَائِشَةَ ؓ فَاحْتَلَمَ فَأَبْصَرَتْهُ جَارِيَةٌ لِعَائِشَةَ وَهُوَ يَغْسِلُ أَثَرَ الْجَنَابَةِ مِنْ ثَوْبِهِ أَوْ يَغْسِلُ ثَوْبَهُ فَأَخْبَرَتْ عَائِشَةَ فَقَالَتْ لَقَدْ رَأَيْتُنِي وَأَنَا أَفْرُكُهُ مِنْ ثَوْبِ رَسُولِ اللَّهِ ﷺ
[Machine] There was a man from the Nakha'i tribe who went to visit Aisha. He fell asleep and a servant girl of Aisha saw him washing away the traces of impurity from his clothes. Bahz said, "Shu'bah reported to me that she said, 'I saw him and I saw no more than him rubbing his clothes against the Messenger of Allah's ﷺ clothes.'"
بَهْزٌ إِنَّ رَجُلًا مِنَ النَّخَعِ كَانَ نَازِلًا عَلَى عَائِشَةَ فَاحْتَلَمَ فَأَبْصَرَتْهُ جَارِيَةٌ لِعَائِشَةَ وَهُوَ يَغْسِلُ أَثَرَ الْجَنَابَةِ مِنْ ثَوْبِهِ أَوْ يَغْسِلُ ثَوْبَهُ قَالَ بَهْزٌ هَكَذَا قَالَ شُعْبَةُ فَقَالَتْ لَقَدْ رَأَيْتُنِي وَمَا أَزِيدُ عَلَى أَنْ أَفْرُكَهُ مِنْ ثَوْبِرَسُولِ اللهِ ﷺ