Messenger of Allah ﷺ said, "It is not lawful for a lady to fast (Nawafil) without the permission of her husband when he is at home; and she should not allow anyone to enter his house except with his permission; and if she spends of his wealth (on charitable purposes) without being ordered by him, he will get half of the reward."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَحِلُّ لِلْمَرْأَةِ أَنْ تَصُومَ وَزَوْجُهَا شَاهِدٌ إِلاَّ بِإِذْنِهِ وَلاَ تَأْذَنَ فِي بَيْتِهِ إِلاَّ بِإِذْنِهِ وَمَا أَنْفَقَتْ مِنْ نَفَقَةٍ عَنْ غَيْرِ أَمْرِهِ فَإِنَّهُ يُؤَدَّى إِلَيْهِ شَطْرُهُ وَرَوَاهُ أَبُو الزِّنَادِ أَيْضًا عَنْ مُوسَى عَنْ أَبِيهِ عَنْ أَبِي هُرَيْرَةَ فِي الصَّوْمِ