I say: Ibn Ḥibbān mentioned him in al-Thiqāt (7/234) and said: “He makes mistakes.”

It is apparent that he was the one who differed in this chain of transmission, omitting Masrūq between Ibn Masʿūd and Abū ʿUbaydah. For all its narrators are reliable apart from Kurz ibn Wabrah. A number of reliable narrators related from him, and Ibn Ḥibbān included him among them. Yet Ibn Ḥibbān contradicted himself concerning him in a remarkable way: he listed him among the Successors (5/338), on the basis of his narration from Anas—which I do not consider sound—and then listed him (9/27) among those who narrated from the Followers of the Successors, on the basis of his narration from al-Thawrī (1)!

Perhaps the correct view is that he should be listed among the Followers of the Successors, since he narrated from Nuʿaym ibn Abī Hind, as in this report and in al-Jarḥ wa al-Taʿdīl (Narrator Criticism and Accreditation). It states (3/2/170):

“Al-Thawrī, Ibn Shubrumah, ʿUbayd Allāh al-Waṣṣāfī, Fuḍayl ibn Ghazwān, and Warqāʾ ibn ʿUmar narrated from him.”

Most of these belonged to the Followers of the Successors, with the exception of Ibn Shubrumah—whose name was ʿAbd Allāh—who, like Nuʿaym ibn Abī Hind, was a Successor; and ʿUbayd Allāh al-Waṣṣāfī—ibn al-Walīd—who was among those who narrated from the Successors. Thus, it is possible that this Kurz was one of the younger Successors. He was renowned for worship—indeed, for excessiveness in it—and remarkable accounts are related of him in this respect. He has an extensive biographical notice in Tārīkh Jurjān (pp. 336–344), al-Ḥilyah (5/79–83), and Siyar Aʿlām al-Nubalāʾ (6/84–86).

I was astonished—by Allah!—that he, despite being a Salafī hadith scholar, remained silent about some of those excesses, such as Kurz’s completing the Quran three times in a day and night, even though he knew that this was contrary to the sunnah, in light of the Prophet’s saying, peace and blessings be upon him: