He was the Sheikh Abu 'Abdullah 'Abdur-Rahman Ibn Naasir Ibn 'Abdullah Ibn Nasir Al Sa'di from the tribe of Banee Tameem.
He was born in the city of 'Unayzah, in the region of Qaseem, on the 12th of Muharram in the year 1307 A.H./1886 C.E. His mother passed away when he was four years old and his father passed away when he was seven years old.
He memorised the Quran and mastered the science of its recitation before he reached the age of 11 years. He then engaged himself in seeking knowledge, studying with the scholars of his city and those who visited it.
From amongst his famous teachers were: Sheikh Ibraaheem Ibn Muhammad Ibn Haasir, Sheikh Muhammad Ibn Abdul Kareem ash-Shibil, Sheikh Saalih Ibn 'Uthmaan, the judge of 'Unayzah and Sheikh Muhammad Shanqeetee, a resident of Hijaaz, and other than them. However, whoever said his teachers were Ibn Taymiyyah and his student Ibn al-Qayyim, then indeed they spoke the truth, for he was certainly an enthusiastic student of their works.
A major characteristic he had was his noble manners. He was extremely humble with the elders and the youngsters. He would talk to all individuals according to his level of understanding and according to that which was good for him. He was indifferent and aloof from the splendor of this world and the temptations of life. He did not care for rank, power nor glory.
He wrote many books, some of which are: Tafseer al-Quran in eight volumes, Haashiyah Fiqhiyyah, Deewaan Khutab, al-Qawaa.id al-Hisaan, Tanzeeh ad-Deen, Radd alaa al-Qaseemee, al-Haqq al-Waadhih al-Mubayyin, Bahjatu Quloob al-Abraar, ar-Riyaadh an-Naadhirah, and other than them.
He continued to live a gratified and praiseworthy life until he passed away on the 24th of Jumaada ath-Thaanee in the year 1376 A.H./1955 C.E.