Gabriel used to repeat the recitation of the Qur'an with the Prophet (ﷺ) once a year, but he repeated it twice with him in the year he died. The Prophet (ﷺ) used to stay in I`tikaf for ten days every year (in the month of Ramadan), but in the year of his death, he stayed in I`tikaf for twenty days.
Reference: Sahih al-Bukhari 4998 In-book : Book 66, Hadith 20 USC-MSA web (English) : Vol. 6, Book 61, Hadith 520 (deprecated)
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