“Quran Revision Abu Huraira, may Allah be pleased with him said:

The Prophet(‎ﷺ), peace and blessings be upon him, would review the Quran once every year in Ramadan

and he reviewed it twice in the year he passed away. The Prophet(‎ﷺ) would seek spiritual retreat in the

mosque for ten days every year and he secluded himself for twenty days in the year he passed away.

Ṣaḥīḥ al-Bukhārī 4998