The Messenger of Allah (ﷺ) used to spend the last ten days of Ramadan in I’tikaf. Nafi' said: " Abdullah bin 'Umar showed me the place where the Messenger of Allah (ﷺ) used to observe I'tikaf."
Sunan Ibn Majah Book 7, Hadith 136
← Previous Hadith It was narrated from ‘Umar that he had vowed during the days of Ignorance to spend one night in I’tikaf. He asked the Prophet (ﷺ) about it, so he commanded him to spend it in I’tikaf.

Sunan Ibn Majah Book 7, Hadith 135 Next Hadith → When the Prophet (ﷺ) observed I’tikaf, his bedding would be spread for him, or his bed would be placed there for him, behind the Pillar of Repentance.

Sunan Ibn Majah Book 7, Hadith 137