Urwah said that among the Ansar who took part in Badr, then from Banu Sawwad bin Ka'b (Ka'b's name was Zafar), is the name of Sayyiduna Sa'd bin Ubayd bin al-Nu'man (may Allah be pleased with him).
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5466
Ibn Shihab said that among the Ansar who took part in Badr, then from al-Aws, then from Banu Amr bin Awf, then from Banu Umayyah bin Zayd, is the name of Sayyiduna Sa'd bin Ubayd bin al-Nu'man (may Allah be pleased with him).
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5467
Muhammad bin Abdullah bin Numayr said: Sa'd bin Ubayd's kunyah was Abu Zayd, and he is the one who collected the Qur'an. His son Umayr bin Sa'd was a governor for Sayyiduna Umar (may Allah be pleased with him). And he is Sa'd bin Ubayd bin al-Nu'man.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5468
Abd al-Rahman bin Abi Layla said: In the time of the Messenger of Allah (peace and blessings be upon him), Sayyiduna Sa'd bin Ubayd (may Allah be pleased with him) was known by the name "al-Qari'" (the Reciter).
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5470
Dawud bin Abi Hind, Isma'il bin Abi Khalid and Zakariyya bin Abi Za'idah said: Six of the Companions of the Prophet (peace and blessings be upon him) collected the Qur'an, all of them from the Ansar: Ubayy bin Ka'b, Mu'adh bin Jabal, Zayd bin Thabit, Abu Zayd and Sa'd bin Ubayd (may Allah be pleased with them).
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5471