Urwah narrated that among those of the Ansar who took part in Badr, then from Banu al-Harith bin al-Khazraj, is the name of Sayyiduna Sa'd bin al-Rabi' bin Abi Zuhayr bin Malik bin Imri' al-Qays bin Tha'labah bin Ka'b bin al-Khazraj bin al-Harith bin al-Khazraj (may Allah be pleased with him).
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5377