Career
He was one of Malik's main companions and had a tremendous influence in recording the positions of the school. Ibn al-Qasim was the source for Sahnun in his Mudawwana, a record of Malik's teachings. Ibn al-Qasim had opinions which differed from those of Malik, to the point that it was said that he was dominated by opinion.
Ibn al-Qasim's full name was 'Abd ar-Rahman ibn ibn al-Qasim al-'Utaqi although he was well known as Ibn al-Qasim. Ibn al-Qasim's origins were from the Palestinian town of Ramla. He was a descendant from the slaves of Ta'if whom the Prophet Muhammad had freed.
Ibn al-Qasim's father was in the Dewan, and he used the money he inherited from him for his studies. He travelled from Egypt to Medina after what is recorded as a visionary dream and after having been drawn to gatherings of religious knowledge in Egypt. Ibn al-Qasim kept the company of Malik for the relatively long period of about twenty years.
It was from him that he learned his fiqh (jurisprudence). Many people related from him and consulted him about Malik's fatwas. Ibn Wahb used to say, "If you want this business – meaning the fiqh of Malik – you must have Ibn al-Qasim.
He is unique in it". Ibn al-Qasim was generally known for his vast knowledge. When Malik was asked about him and Ibn Wahb, he replied that Ibn Wahb was a knowledgeble man whilst Ibn al-Qasim was a true faqih (jurist). He was also known as having ascetic qualities and spent much of his time reciting the Quran such that he would finish many readings in a short space of time.
On his return to Egypt he refused to marry the daughters of wealthy officials and generally kept clear of the ruling class. He died in Egypt at the age of 63 in the month of Safar, 191 AH (806 CE) three days after returning from a trip to Mecca.