I say: Furthermore, more than one transmitter has related the aforementioned ḥadīth from the scribe of al-Layth, so it is certain that he is the one intended.
Likewise, in the “Jihād” section of the Ṣaḥīḥ (1) we read: “ʿAbd Allah narrated to us; ʿAbd al-ʿAzīz ibn Abī Salamah narrated to us, from Ṣāliḥ ibn Kaysān, from Sālim, from his father, who said: ‘Whenever the Prophet ﷺ returned from Ḥajj…’”—and he quoted the remainder of the report (2).
Abū ʿAlī ibn al-Sakan said: “Al-Firabrī narrated to us; al-Bukhārī narrated to us; ʿAbd Allah ibn Yūsuf narrated to us,” and he mentioned the ḥadīth. Ibn al-Sakan recorded it in his Musannaf.
Abū Masʿūd said in al-Aṭrāf: “This ḥadīth is transmitted by people on the authority of ʿAbd Allah ibn Ṣāliḥ (3).” He added: “It has also been reported from ʿAbd Allah ibn Rajāʾ; Allah knows best which of the two is correct.”
Al-Ghassānī said: “Rather, it is the scribe of al-Layth.”
Ibn Ḥibbān said: “Abū Ṣāliḥ served as the clerk in charge of al-Layth’s revenue registers; his ḥadīths are exceedingly objectionable, though he was truthful in himself. I heard Ibn Khuzaymah say: He had a neighbor who was hostile toward him, and that neighbor used to fabricate ḥadīths in the name of Shaykh ʿAbd Allah ibn Ṣāliḥ and would write them in…"