Biography of Sa'd ibn ar-Rabi' al-Ansari
Sa'd ibn al-Rabi' ibn 'Amr ibn Abu Zuhayr ibn Malik ibn Amr al-Qays ibn Malik al-Aghar ibn Tha'laba ibn Ka'b ibn al-Khazraji al-Ansari al-Khazraji
Uqbi, Badri, Naqib, He was one of the naqibs of the Ansar, as stated by 'Urwah, Ibn Shihab, and Musa ibn 'Uqba, and all the people of sirah that he was the naqib of Banu al-Harith ibn al-Khazraji. And 'Abd Allah ibn Rawaha was his scribe in jahiliyyah. He witnessed the first and second 'Aqaba, and was killed on the Day of Uhud as a martyr.
We were informed by Abu al-Haram Makkai ibn Zabban ibn Shabah al-Muqri al-Nahwi in his isnad, from Yahya ibn Yahya, from Malik ibn Anas, from Yahya ibn Sa'id, who said: When it was the Day of Uhud, the Messenger of Allah ﷺ said: 'On that day: '