He was born in Makah in the year 1388 Hijrah, and grew up in a house of deen and knowledge for his grandfather and father were from the grouping of the Fatwas of Sheikh Al-Islam ibn Taymiyya and the Fatwas of the imams of Najd. Sheikh Qasim began as a student of knowledge at a very young age where he memorized the Qur’an. Amongst the prominent people of knowledge with whom he studied from were:
Sheikh Abdullah bin Humaid Rahimahullah
Abdul-Aziz bin Abd-Allah bin Baz Rahimahullah
Sheikh Salih bin Ali An-Nasir Rahimahullah
Sheikh Al-Muhaddith Abdullah As-Sa’d
He graduated from the College of Sharia in Riyaadh in the year 1410 and continued higher education for judges and obtained his masters in the year 1413. He was appointed as (inherent judicial) in Riyaadh then appointed as judge in the Tabook in the Judiciary of Innovation. He was then appointed as Imam of Masjid An-Nabawi in the year 1418 he was moved (as judge) to the city of the Prophet sallallahu alayhi wasallam.