Ibn 'Umar (May Allah be pleased with them) reported: The Messenger of Allah (PBUH) used to observe I'tikaf in the last ten days of Ramadan.
I`tikaf (Seclusion in the Mosque) in the Month of Ramadan
Chapter 232 · 3 hadiths
'Aishah (May Allah be pleased with her) reported: The Prophet (PBUH) used to engage himself in I'tikaf (seclusion for prayers) in the mosque during the last ten nights of Ramadan till he passed away; thereafter, his wives followed this practice after him.
Abu Hurairah (May Allah be pleased with him) reported: The Prophet (PBUH) used to observe I'tikaf every year (during Ramadan) for ten days; in the year in which he passed away, he observed I'tikaf for twenty days.
Commentary
We learn from these Ahadith that the observance of I'tikaf in the last ten days of Ramadan is Sunnah of the Prophet (PBUH). But it can be done only in mosque not at home. I'tikaf helps to enhance one's spiritual growth and to strive hard to worship Allah better as there is nothing to distract one's attention from this noble pursuit.