Muwatta Malik, Book 28, Hadith 37 (USC-MSA) ⓘ

Yahya related to me from Malik from Yahya ibn Said that Abu Nahshal ibn al-Aswad said to al-Qasim ibn Muhammad,"I saw a slave-girl of mine uncovered in the moonlight, and so I sat on her as a man sits on a woman. She said that she was menstruating, so I stood up and have not gone near her after that. Can I give her to my son to have intercourse with?" Al-Qasim forbade that.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَنَّ أَبَا نَهْشَلِ بْنَ الأَسْوَدِ، قَالَ لِلْقَاسِمِ بْنِ مُحَمَّدٍ إِنِّي رَأَيْتُ جَارِيَةً لِي مُنْكَشِفًا عَنْهَا وَهِيَ فِي الْقَمَرِ فَجَلَسْتُ مِنْهَا مَجْلِسَ الرَّجُلِ مِنِ امْرَأَتِهِ فَقَالَتْ إِنِّي حَائِضٌ فَقُمْتُ فَلَمْ أَقْرَبْهَا بَعْدُ أَفَأَهَبُهَا لاِبْنِي يَطَؤُهَا فَنَهَاهُ الْقَاسِمُ عَنْ ذَلِكَ ‏.‏