Sahih Muslim – Hadith No : 2572

Zuhri reported that (once) the Apostle of Allah (may peace be upon him) took an oath that he would not go to his wives for one Month. Zuhri said that ‘Urwa narrated to him from ‘A’isha (Allah be pleased with her) that she said: When twenty-nine nights were over, which I had counted, the Messenger of Allah (may peace be upon him) came to me (he came to me first of all). I said: Messenger of Allah, you had taken an oath that you would not come to us for a month, whereas you have come after twenty nine days which I have counted. Whereupon he said: The month may also consist of twenty-nine days.

Hadith In Arabic Text :

حدثنا عبد بن حميد، أخبرنا عبد الرزاق، أخبرنا معمر، عن الزهري، أن النبي صلى الله عليه وسلم أقسم أن لا يدخل على أزواجه شهرا – قال الزهري – فأخبرني عروة عن عائشة – رضى الله عنها – قالت لما مضت تسع وعشرون ليلة أعدهن دخل على رسول الله صلى الله عليه وسلم – قالت بدأ بي – فقلت يا رسول الله إنك أقسمت أن لا تدخل علينا شهرا وإنك دخلت من تسع وعشرين أعدهن فقال ‏”‏ إن الشهر تسع وعشرون ‏”‏ ‏.‏

Chapter : The Book of Fasting – كتاب الصيام