I add: al-Bukhārī recorded narrations from him in al-Adab al-Mufrad, Muslim cited him in the introduction to his work, and the compilers of the Sunan also transmitted from him. His ḥadiths are fair (ḥasan), and he enjoyed great esteem.

51 – Khalaf ibn Tamīm al-Tamīmī al-Kūfī * (S, Q)
The Imām, the ascetic, Abū ʿAbd al-Raḥmān al-Tamīmī, a Kufan and the client of the family of Jaʿdah.
He settled in al-Maṣīṣa for the purpose of jihad and kept the company of Ibrāhīm ibn Adham.

He transmitted ḥadith from ʿĀṣim ibn Muḥammad, Abū Bakr al-Nahshalī, al-Thawrī, Zāʾidah, and several others.

Those who narrated from him include Abū Isḥāq al-Fazārī—who had himself been one of his teachers—Muḥammad ibn Saʿd, Aḥmad al-Dawraqī, Ṣāʿiqah, al-Dūrī, al-Ṣāghānī, Muḥammad ibn al-Faraj al-Azraq, and ʿAbbās al-Tarqufī (1).

Abū Ḥātim declared him reliable (2).
Yaḥyā ibn Maʿīn said, “Truthful” (3).
Yaʿqūb ibn Shaybah remarked, “Trustworthy, one of the devout ascetics and warriors” (4).