Mishkat al-Masabih 29 Excellent Qualities and Description of the Prophet كتاب الفضائل والشمائل 76

وَعَنِ الْأَسْوَدِ قَالَ: سَأَلْتُ عَائِشَةَ: مَا كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَصْنَعُ فِي بَيْتِهِ؟ قَالَتْ: كَانَ يَكُونُ فِي مَهْنَةِ أَهْلِهِ – تَعْنِي خدمَة أَهله – فَإِذا حضرت الصَّلَاة خرج إِلَى الصَّلَاة. رَوَاهُ البُخَارِيّ

Al-Aswad told that he asked `A’isha what the Prophet used to do in his house, and she replied that he used to engage in the mihna , i.e. the service, of his family, and when the time for prayer came he went out to prayer. Bukhari transmitted it.