Sahih Muslim , Book 6, Hadith 2442 (USC-MSA) ⓘ

Aswad reported: I and Masruq went to 'A'isha (Allah be pleased with her) and asked. her if the Messenger of Allah embraced (his wives) while fasting. She said: Yes; but he had the greatest control over his desire among you: or he was one of those who had control over his desire.

وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا أَبُو عَاصِمٍ، قَالَ سَمِعْتُ ابْنَ عَوْنٍ، عَنْ إِبْرَاهِيمَ، عَنِ الأَسْوَدِ، قَالَ انْطَلَقْتُ أَنَا وَمَسْرُوقٌ، إِلَى عَائِشَةَ - رضى الله عنها - فَقُلْنَا لَهَا أَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُبَاشِرُ وَهُوَ صَائِمٌ قَالَتْ نَعَمْ وَلَكِنَّهُ كَانَ أَمْلَكَكُمْ لإِرْبِهِ أَوْ مِنْ أَمْلَكِكُمْ لإِرْبِهِ ‏.‏ شَكَّ أَبُو عَاصِمٍ ‏.‏

It is further narrated on the authority of Aswad and Masruq that they went to the Mother of the Believers and they asked her (and the rest of the hadith is the same)

وَحَدَّثَنِيهِ يَعْقُوبُ الدَّوْرَقِيُّ، حَدَّثَنَا إِسْمَاعِيلُ، عَنِ ابْنِ عَوْنٍ، عَنْ إِبْرَاهِيمَ، عَنِ الأَسْوَدِ، وَمَسْرُوقٍ أَنَّهُمَا دَخَلاَ عَلَى أُمِّ الْمُؤْمِنِينَ يَسْأَلاَنِهَا ‏.‏ فَذَكَرَ نَحْوَهُ ‏.‏