(1) Ibn Māndah transmits it in his al-Radd ‘alā man yaqūl: “Alif Lam Mim Is a Letter” (p. 63), hadith no. 22. Its isnād is very weak, as it includes Thuwair ibn Abī Fākhitah—namely Saʿīd ibn ʿAllāqah al-Qurashī al-Hāshimī, known as Abū al-Jahm al-Kūfī. Sufyān remarked that “Thuwair was one of the pillars of falsehood,” and Yaḥyā said, “He is nothing.” Both al-Jawzajānī and Abū Ḥātim declared him weak; al-Nasa’ī judged him unreliable; and al-Daraqṭnī and ʿAlī ibn al-Junayd labeled him abandoned (matrūk). (Tahdhīb al-Tahdhīb, 2:36–37.) (2) He is ʿAbd al-Raḥmān ibn Yazīd ibn Qays al-Nakhaʿī, a trustworthy muhaddith. He narrated from the Commander of the Faithful ʿUthmān ibn ʿAffān, from the Mother of the Believers ʿA’ishah, and from the Companions Ibn Masʿūd, Abū Mūsā al-Ashʿarī, Salman al-Fārisī, Ḥuḍayfah ibn al-Yamān, Abū Masʿūd al-Badrī, among others. He died in 73 AH (some report 83 AH). (Tahdhīb al-Kamāl, 18:12–14; Tahdhīb al-Tahdhīb, 6:299.) (3) I did not find it.