حَدَّثَنَا مُجَاهِدُ بْنُ مُوسَى، حَدَّثَنَا الْقَاسِمُ بْنُ مَالِكٍ الْمُزَنِيُّ، حَدَّثَنَا الْجُرَيْرِيُّ، عَنْ أَبِي نَضْرَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ مَا صُمْنَا عَلَى عَهْدِ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ تِسْعًا وَعِشْرِينَ أَكْثَرُ مِمَّا صُمْنَا ثَلاَثِينَ ‏.‏

It was narrated that Abu Hurairah said: "(The months in which) We fasted twenty-nine days at the time of the Messenger of Allah (PBUH), were more than (the months in which) we fasted thirty days. Translation Not Available

Book Ref: Sunan Ibn Majah Book 7 Hadith 1658
Web Ref:  Sunan Ibn Majah Vol 1 Book 7 Hadith 1658