It was recorded by Ibn Abī Shaybah in "al-Muṣannaf" (2/242), and al-Ṭayālisī in "Musnad" (257/1893), both saying: Abū al-Aḥwaṣ narrated it. Mūsá ibn Dāwūd disagreed with them regarding the text, saying: Abū al-Aḥwaṣ narrated it without the addition. It was recorded by al-Ṭabarānī (12/415/13528). And Mūsá ibn Dāwūd: he is al-Ḍabbī, and al-Ḥāfiẓ said: "Truthful, a jurist, ascetic, but with errors." His contradiction does not harm [the narration]; because the addition of a trustworthy narrator is accepted, especially when it is from two trustworthy and reliable narrators, as is apparent. The ḥadīth has two other chains from Ibn ʿUmar, but they are weak: one of them is from Layth from Nāfiʿ from Ibn ʿUmar, who said: I observed the Prophet (ṣallá Allāhu ʿalayhi wa-sallam) for twenty nights or twenty-five nights or a month... the ḥadīth with the addition. It was recorded by Ibn Naṣr al-Marwazī in "Qiyām al-Layl" (p. 31 - Hindiyyah Rafāh). I said: Its narrators are trustworthy, the narrators of al-Bukhārī; except for Layth—who is Ibn Abī Sulaym—, al-Dhahabī said in "al-Kāshif": "He has slight weakness due to poor memory." I said: This is due to his confusion, so he is used as supporting evidence. The other chain: narrated by Ismāʿīl ibn ʿAmr al-Bajalī: Na Israel from Thuwair ibn Abī Fākhitah from Ibn ʿUmar with it