كتاب الزكاة
12  
The Book of Zakat
(26)
Chapter: What a slave spends of his master's wealth
(26)
باب مَا أَنْفَقَ الْعَبْدُ مِنْ مَالِ مَوْلاَهُ ‏‏
Sahih Muslim 1026

Hammam b. Munabbih said:

These are some of the a hadith of Muhammad. the Messenger of Allah (ﷺ), transmitted to us on the authority of Abu Huraira. So he narrated one hadith out of them (as this): The Messenger of Allah (ﷺ) said: No woman should observe fast when her spouse is present (in the house) but with his permission. And she should not admit any (mahram) in his house, while he (her husband) is present, but with his permission. And whatever she spends from his earnings without his sanction, for him is half the reward.
حَدَّثَنَا مُحَمَّدُ بْنُ رَافِعٍ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، حَدَّثَنَا مَعْمَرٌ، عَنْ هَمَّامِ بْنِ مُنَبِّهٍ، قَالَ هَذَا مَا حَدَّثَنَا أَبُو هُرَيْرَةَ، عَنْ مُحَمَّدٍ، رَسُولِ اللَّهِ صلى الله عليه وسلم فَذَكَرَ أَحَادِيثَ مِنْهَا وَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لاَ تَصُمِ الْمَرْأَةُ وَبَعْلُهَا شَاهِدٌ إِلاَّ بِإِذْنِهِ وَلاَ تَأْذَنْ فِي بَيْتِهِ وَهُوَ شَاهِدٌ إِلاَّ بِإِذْنِهِ وَمَا أَنْفَقَتْ مِنْ كَسْبِهِ مِنْ غَيْرِ أَمْرِهِ فَإِنَّ نِصْفَ أَجْرِهِ لَهُ ‏"‏ ‏.‏
Reference : Sahih Muslim 1026
In-book reference : Book 12, Hadith 107
USC-MSA web (English) reference : Book 5, Hadith 2238
  (deprecated numbering scheme)