Abu Ubaid al-Qasim bin Salam

Abu Ubaid al-Qasim ibn Sallam al-Khurasani al-Harawi (Arabic: أبو عبيد القاسم بن سلاّم الخراساني الهروي, romanized: Abū ‘Ubayd al-Qāsim ibn Sallām al-Khurāsānī al-Harawī; c. 770–838) was an Arab philologist and the author of many standard books on lexicography, Qur’anic sciences, hadith, and fiqh.

Abu Ubaid
Personal life
Born	c. 154 AH/770 CE Herat, Abbasid Caliphate
Died	224 AH/838 (aged 68) Mecca, Abbasid Caliphate
Era	Islamic golden age
Main interest(s)	History, Tafsir, Hadith, Fiqh
Religious life
Religion	Islam
Denomination	Sunni
Creed	Shafi‘i
Muslim leader
Influenced by al-Asmaʿi, Abu ʿUbayda, Sa'id ibn Aws al-Ansari, Abu ʿAmr al-Shaybani, al-Kisa'i, al-Farra and others[1]

He was born in Herat, the son of a Byzantine slave. He left his native town and studied philology at the Basra school under many famous scholars such as al-Asmaʿi (d. 213/828), Abu ʿUbayda (d. c.210/825), and Abu Zayd al-Ansari (d. 214 or 215/830–1), and at the Kufa school under Abu ʿAmr al-Shaybani (d. c.210/825), al-Kisaʾi (d. c.189/805), and others.

He was the first to develop a recorded science for tajwid, giving the rules of tajwid names and putting it into writing in his book called al-Qirā'āt. He wrote about 25 reciters, including the 7 mutawatir reciters.^[2] He made the reality, transmitted through reciters of every generation, a science with defined rules, terms, and enunciation.^[3][4] He wrote extensively on the originally revealed, but then abrogated, verses from the Qur’an. ^[5][6]

Selected works

• Kitab al-Amwal (The Book of Revenue)^[7]
• Kitab Al-Nāsikh wa-l-mansūkh (The Book of Abrogation)^[8]
• Kitab Fada’il-al-Qur’an (The Excellent Qualities of the Holy Quran)
• Kitab Al-Iman^[9]