It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that a woman came to the Prophet (peace and blessings be upon him) while we were with him, and she said: "O Messenger of Allah! My husband, Safwan bin al-Mu'attal, beats me when I pray, makes me break my fast when I fast, and does not pray the Fajr prayer until the sun has risen." The narrator says: Safwan was present there, so he (peace and blessings be upon him) asked him about the woman's complaint. He said: "O Messenger of Allah! As for her saying that I beat her for praying, she recites two surahs (in the prayer) which I have forbidden her from, and I told her that if a single surah were recited it would suffice the people. As for her saying that I make her break her fast, she starts keeping (voluntary) fasts while I am a young man and cannot restrain myself (from my natural need)." So on that day the Messenger of Allah (peace and blessings be upon him) said: "No woman should keep a (voluntary) fast except with her husband's permission." And as for her saying that I do not pray until the sun has risen, we are a household known for this (that we sleep deeply), and we hardly wake up until the sun has risen. He (peace and blessings be upon him) said: "(Safwan!) When you wake up, then pray." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.