He selected a mode of recitation that gained wide renown and was eventually counted among the seven canonical readings.
In grammar he kept the company of al-Khalīl, and he spent a period roaming the deserts of the Ḥijāz in search of authentic Arabic. It was said that he returned after having exhausted fifteen flasks of ink in writing. He also studied under Yūnus (1).
Al-Shāfiʿī declared, “Whoever wishes to plumb the depths of grammar is dependent on al-Kisāʾī.”
Ibn al-Anbārī said, “In him were combined unmatched mastery of grammar, singular expertise in rare vocabulary, and unrivalled knowledge of the Qurʾān. People flocked to him in such numbers that precision became difficult, so he would gather them together, seat himself on a chair, and recite while they recorded from him—even the pause marks.”
Isḥāq ibn Ibrāhīm said, “I heard al-Kisāʾī recite the Qurʾān to the people twice.”
Khalaf related: “I used to sit before al-Kisāʾī while he recited, and they would add the diacritical points to their codices according to his reading.”
Among those who received their recitation from him were: Abū ʿUmar al-Dūrī, Abū al-Ḥārith al-Layth, Nuṣayr (2) ibn Yūsuf al-Rāzī, Qutaybah ibn Mihrān al-Iṣbahānī, Aḥmad ibn Abī Surayj, Aḥmad ibn Jubayr al-Anṭākī, Abū Ḥamdūn al-Ṭayyib, ʿĪsā ibn Sulaymān al-Shayzarī, and several others.