A'isha (Allah be pleased with her) reported that the Messenger of Allah (ﷺ) used to observe i'tikaf in the last ten days of Ramadan

This hadith has been narrated by 'A'isha (Allah be pleased with her) through another chain of transmitters

A'isha (Allah be pleased with her) reported that the Messenger of Allah (may peace he upon him) used to observe i'tikif in the last ten days of Ramadan till Allah called him back (to his heavenly home). Then his wives observed i'tikaf after him