It wasnarrated that Abu Hurairah said:
"The Prophet (ﷺ) used toobserveI'tikaf for ten days every year. In the year in which hepassedaway, he observed I'tikaf for twenty days. And the Qur'an wouldbe reviewed with him once every year, but in the year in which hepassed away, it was reviewed with him twice."
English reference: Vol. 1, Book 7, Hadith 1769
Arabic reference: Book 7, Hadith 1841