Is observing I’tikaf in the last ten days a sunnah of our Holy Prophet (SAW)? Did the blessed wives of our Holy Prophet (SAW) also observe I’tikaf in some form?
It is related on the authority of Sayyidina Aysha (RA) that the Prophet (SAW) observed I’tikaf regularly in the last ten days of Ramadan, till the end of his life. After his death, his wives continued with it (in a designated area in their home).”
[Bukhari and Muslim]