Imam Al-Qaasim bin Feerruh bin Khalaf bin Ahmed Ash-Shaatibiyy was a scholar from Andalusia and amazing enough, blind, and was a great scholar of the qira’aat. He composed a poem outlining the two most famous ways passed down from each of seven strong imams. This poem is named , but has become known by the name of its author, and therefore often called Ash-Shatibiyyah.

Rawee, when referring to ways of recitation is a narrator who related a specific way from a main imam of recitation. He either took the way from the imam directly or through one of his students.

This is the explanation of Imam al-Shatibi’s famous poem on the 7 Qiraa’aat : حرز الأماني ووجه التهاني في القراءات السبع. In this poem, Imam al-Shatibi, may Allah have mercy upon him, documents the rules of 7 of the 10 authentic Qiraa’aat, i.e. the Qira’ah of Naafi’, Ibn Katheer, Abu ‘Amr, Ibn ‘Aamir, ‘Aasim, al-Kisaa’i, and Hamzah.

The seven Qiraat were preserved by Mujahid and by Imam Shatibi in his famous poem “Ash-Shatibiyyah”. The Qari of each style had his style preserved by two of his students, among whom there would be small variations but not as significant as the variations between the Qira’aat themselves. The Qari had many students but the choice of who preserved them was that of Imam Abu ‘Amar Ad-Daani in his famous book “Kitab At-Tayseer fil Qira’aatis Saba”. The name in the square bracket is what the Qira’ah and the Tariqah are more commonly known as well.

The Shatibiyyah poem then is as described above. It is 1173 lines long and a major reference for the seven qira’aat.
https://www.onlinequranteachers.com/course/ijazah-in-ash-shatibiyyah/