Al-Kāfi - Volume 4 > The Case of Those Who Need Permission to Fast Optional Fasting
Hadith #5

5ـ عَلِيُّ بْنُ مُحَمَّدِ بْنِ بُنْدَارَ عَنْ أَحْمَدَ بْنِ أَبِي عَبْدِ الله عَنِ الْجَامُورَانِيِّ عَنِ الْحَسَنِ بْنِ عَلِيِّ بْنِ أَبِي حَمْزَةَ عَنْ عَمْرِو بْنِ جُبَيْرٍ الْعَزْرَمِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ جَاءَتِ امْرَأَةٌ إِلَى النَّبِيِّ (صلَّى اللهُ عَلَيْهِ وَآلِه) فَقَالَتْ يَا رَسُولَ الله مَا حَقُّ الزَّوْجِ عَلَى الْمَرْأَةِ فَقَالَ هُوَ أَكْثَرُ مِنْ ذَلِكَ فَقَالَتْ أَخْبِرْنِي بِشَيْ‏ءٍ مِنْ ذَلِكَ فَقَالَ لَيْسَ لَهَا أَنْ تَصُومَ إِلاَّ بِإِذْنِهِ.

5. Ali ibn Muhammad ibn Bandar has narrated from Ahmad ibn abu ‘Abd Allah al-Jamuraniy from al-Hassan ibn Ali ibn abu Hamzah from ‘Amr ibn Jubayr al-‘Arzamiy who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that once a woman came to the Holy prophet, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, and asked, ‘O Messenger of Allah, what is the right of a husband on the wife?’ He (the Messenger of Allah) said, ‘It is more than that.’ She then said, ‘Tell me about a few of them.’ He (the Messenger of Allah) said, ‘She must not fast without his permission.’”