(1) He is Abu Sa‘id ibn al-Hasan ibn Abi al-Hasan Yasar al-Basri, one of the foremost figures of his time in knowledge, practice, courage, and asceticism. He died in 110 AH. See Hilyat al-Awliya’ (vol. 2, p. 131); Siyar A‘lam al-Nubala’ (vol. 4, p. 563). (2) It was transmitted similarly by Abd al-Razzaq in his Musannaf (3:363), by Ibn al-Mubarak in Al-Zuhd (p. 247, hadith no. 793), by al-Firyabi in Fada’il al-Qur’an (p. 247, hadith no. 177), and by Ibn Abi Hatim in his Tafsir, as cited in Tafsir Ibn Kathir (4:33). (3) See As-Sirat al-Mustaqim fi Ithbat al-Harf al-Qadim by the author (p. 35); Al-Burhan fi Bayan al-Qur’an by the same (p. 56); Fada’il al-Qur’an by Ibn Ubayd (pp. 152–162); Lamhat al-Anwar wa Nafahat al-Azhar by Muḥammad ibn ‘Abd al-Wāḥid al-Ghafqi (vol. 1, pp. 104–123); Al-Burhan fi ‘Ulūm al-Qur’an by al-Zarkashi (vol. 1, pp. 249–252); Al-Itqān fi ‘Ulūm al-Qur’an by al-Suyuti (vol. 1, pp. 86–93); Sa‘adat al-Darayn fi Bayan Wa‘d Āy al-Mu‘jiz al-Thaqalayn by Muḥammad ibn ‘Ali al-Husayni.