Biography of Sa'd ibn Junadah
Dhahabi: Aban ibn Sa'id, the father of Atiyya al-Awfi.
He was from Awf ibn Tha'laba ibn Sa'id ibn Dhubyana.
Muhammad ibn al-Hasan ibn Atiyya, from his father, from his grandfather Atiyya, from his father Aban ibn Sa'id, said: The Messenger of Allah ﷺ said: 'There is nothing more beloved to Allah than a believing slave if he swears an oath to Allah, He will fulfill it.'
Yunus ibn Nufay', from Aban ibn Sa'id, said: I was among the first to visit the Prophet ﷺ from the people of Ta'if, so I accepted Islam.
Authored by Ibn Mandah, and Abu Na'im.
[2 - Sa'd ibn Jandal]
Bukhari: Sa'd ibn Jandal, the father of Sinan ibn Sa'd.
His son Sinan, said: He heard the Prophet ﷺ say: 'The Imam does not monopolize supplication for himself over the people.'
Authored by Abu 'Umar, who said: The chain of narration for this hadith is weak.
[2 - Sa'd ibn al-Harith]
Bukhari and Muslim: Sa'd ibn al-Harith ibn as-Samma', who has previously been mentioned with his father, and he is an Ansari Khazrajite, from the Banu an-Najjar.
He accompanied the Prophet ﷺ, his father, and witnessed Siffin with Ali, and was killed on that day, and he is the brother of Abu al-Jahm ibn al-Harith ibn as-Samma'.
Authored by Abu 'Umar, and Abu Musa.