Muhammad bin Ishaq relates that among the Ansar who took part in Badr, then of Banu Abd al-Ashhal, is the name of Sayyiduna Sa'd bin Mu'adh bin al-Nu'man bin Imru' al-Qays bin Zayd bin Abd al-Ashhal bin Jusham bin al-Harith bin al-Khazraj bin Amr bin Awf bin Malik bin al-Aws (may Allah be pleased with him).
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5301