رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1750
The Book of the Prohibited actions
Prohibition of Observing an Optional Saum (Fast) by a Woman without the Permission of her Husband
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّه عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ قَالَ: لاَ يَحِلُّ لِلْمَرْأَةِ أَنْ تَصُومَ وَزَوْجُهَا شَاهِدٌ إِلاَّ بِإِذْنِهِ، وَلاَ تَأْذَنَ فِي بَيْتِهِ إِلاَّ بِإِذْنِهِ ((مُتَّفَقٌ عَلَيْهِ)).
Abu Hurairah (May Allah be pleased with him) said: The Messenger of Allah (ﷺ) said, "It is not lawful for a woman to observe an optional Saum (fast) without the permission of her husband when he is at home. Nor should she allow anyone to enter his house without his permission." [Al-Bukhari and Muslim].
Riyad as-Salihin, 1750