First of these is Hazrat Subai bin Qais bin Eesha. His grandfather’s name has been variably written as Absa or Easha. He was from among the Ansar [inhabitants of Medina] and belonged to the tribe Khazraj. He participated in battles of Badr and Uhud.
(Usdul Ghaaba, Vol. 2, p. 407, Subai bin Qais, Dar-ul-Kutub-ul-Ilmiyyah, 1996, Beirut), (At-Tabaqat Al-Kubra, Vol. 3, p. 403, Subai bin Qaid and Abada bin Qais, Da-ul-Kutub Al-Ilmiyyah, 1990, Beirut)