It was
narrated that Abu Hurairah said:
"(The months in which) We fasted twenty-nine days at the time of the Messenger of Allah (ﷺ), were
more than (the months in which) we fasted thirty days. (ID)
English reference (ID): Vol. 1, Book 7, Hadith 1658 (ID)
Arabic reference (ID): Book 7, Hadith 1727 (ID)