Sahih Muslim | Book 6 | Chapter 25

Narrated by Abu Salama
Abu Salama reported: I heard 'Aisha (Allah be pleased with her) as saying: I had to complete some of the fasts of Ramadan, but I could not do it but during the month of Sha'ban due to my duties to the Messenger of Allah (may peace be upon him) or with the Messenger of Allah (may peace be upon him).

Narrated by Yahya b. Sa'id
This hadith is narrated on the authority of Yahya b. Sa'id with the same chain of transmitters but with this variation that he said that ('Aisha did not observe fast but in Sha'ban) out of regard for the Messenger of Allah (may peace be upon him). (In another version, the words are): "Yahya said: I think it was due to the regard for the Apostle of Allah (may peace be upon him).

Narrated by
This hadith is reported on the authority of Yahya with the same chain of transmitters but no mention is made of the duty to the Messenger of Allah (may peace be upon him).

Narrated by 'Aisha
'Aisha reported: If one amongst us had to break fasts (of Ramadan due to natural reasons, i.e. menses) during the life of the Messenger of Allah (may peace be upon him) she could not find it possible to complete them so long she had been in the presence of Allah's Messenger (may peace be upon him) till Sha'ban commenced.