Abū Ayyūb al-Anṣārī, Khālid b. Zayd b. Kulayb b. Najjār (d. 52/672), was a Companion of the Prophet and of ʿAlī b. Abī Ṭālib. He was a member of the clan of Najjār, which was connected to the famous tribe of Khazraj. His mother was the daughter of Saʿd b. Qays b. ʿAmr b. Imruʾ al-Qays, and his wife was the daughter of Zayd b. Thābit (Ibn Saʿd, 3/484; Ibn ʿAbd al-Barr, 2/424). According to Ibn Saʿd (3/484), he had a son named ʿAbd al-Raḥmān who had no descendants. It was unanimously reported that A…