In The Name of Allaah, The Most Merciful, The Bestower of Mercy
He is Muhammad Ibn Salaam Ibn Al-Farj Abu Abdillaah Al-Beekandiy. He was born in the year 161AH and his death date was on Sunday 8th in the month of Safar 225AH. He was a Shaikh of (Imaam) Bukhaari and he narrated from him in his Saheeh (i.e. Saheeh Al-Bukhaari). He was from those given comprehension in knowledge and he was from the Imaams of the Athar (i.e. possessors’ of knowledge of the ahaadeeth and the narrations of the Sahaabah).
Muhammad Ibn Ahmad An-Najjaar (rahimahullaah) said: ”Ibn Salaam had authorships in every sphere of knowledge (i.e. knowledge of the sharia).”
Shaikhul Islaam Ibn Taymiyyah (rahimahullaah) mentioned his (Ibn Salaam’s) Book [titled: As-Sunnah Wal-Jamaa’ah] in Al-Fataawaa Al-Kubraa 5/4140]. Shaikh Abdus Salaam Burgess (rahimahullaah) stated that Ibn Salaam’s biography can be found in [سيراعلام نبلاء10/656]
[Source: Abridged; for further details, see: تاريخ تدوين العقيدة السلفية by Shaikh Abdus Salaam Burgess (rahimahullaah) page: 24]