"unknown. This was stated by al-Ḥusaynī. And he said at another time: it is not known who he is. This is the statement of al-Dhahabī in "al-Mīzān," and Ibn Ḥibbān mentioned him in "al-Thiqāt" and included his ḥadīth in "Ṣaḥīḥ," and I read in the handwriting of al-Ḥāfiẓ Ibn ʿAbd al-Hādī: it is possible that he is Khālid ibn Salamah. I say: this is unlikely because Khālid is from the Makhzūmī tribe and this one is from the Juhanī tribe." I say: what al-Ḥāfiẓ considered unlikely is correct, as will be shown, and Shaykh Aḥmad Shākir (may Allāh have mercy on him) agreed with this in his commentary on the Musnad (5/267) and added: "Closer to me is that he is Mūsá ibn ʿAbd Allāh or Ibn ʿAbd al-Juhanī and is nicknamed Abū Salamah, as he is from this generation." I say: what the Shaykh concluded is what I am certain of, based on what he mentioned, along with another piece of evidence, which is that Mūsá al-Juhanī narrated another ḥadīth from al-Qāsim ibn ʿAbd al-Raḥmān with it, which is the ḥadīth before it. When one narration is combined with the other, it results that the narrator from al-Qāsim is Mūsá Abū Salamah al-Juhanī, and there is no narrator named Mūsá al-Juhanī except Mūsá ibn ʿAbd Allāh al-Juhanī, who is nicknamed Abū Salamah and is a trustworthy narrator from the men of Muslim. It seems that al-Ḥākim (may Allāh have mercy on him) pointed to this fact when he said about the ḥadīth "authentic according to the criteria of Muslim..." which means that its narrators are the narrators of Muslim, including Abū Salamah al-Juhanī, and this can only be the case if he is Mūsá ibn ʿAbd Allāh al-Juhanī. So take advantage of this verification, for you will not see it elsewhere. And all praise is due to Allāh for His guidance