ʿUmayrah ibn Ḥiṣn—together with Abū al-Muhājir ʿAbd Allāh ibn ʿUmayrah al-Qaysī, ʿAbd Allāh ibn ʿUmayrah the companion of al-Aḥnaf, ʿAbd Allāh ibn ʿUmayrah who served as al-Aʿshā’s guide in the pre-Islamic era, Ibrāhīm al-Nakhaʿī, Tharwān ibn Milḥān, Jaʿfar ibn Abī Thawr, al-Ḥasan al-Baṣrī, Abū Ẓabyān al-Janabī, Sulaymān ibn Abī Ṣāliḥ—the client of ʿAqīl ibn Abī Ṭālib—Ḥumayd, the nephew of Ṣafwān ibn Umayyah, Ḥasan al-Kinānī, Sayyār ibn Maʿrūr al-Māzinī, al-Shaʿbī, ʿAbbād ibn Ḥubaysh, ʿAbd Allāh ibn Jubayr al-Khuzāʿī, ʿAbd Allāh ibn Ẓālim al-Māzinī, and many others.
He even related from al-Qāsim ibn Mukhaimarah and ʿAbd al-Raḥmān ibn al-Qāsim ibn Muḥammad, and he was regarded as one of the standard-bearers of proof in his region.
Those who transmitted from him include: Zakariyyā ibn Abī Zāʾidah, Ḥātim ibn Abī Ṣaghīrah, Mālik ibn Mighwal, Shuʿbah, al-Thawrī, Zāʾidah, al-Ḥasan ibn Ṣāliḥ, Sulaymān ibn Qarm ibn Muʿādh, Shaybān the grammarian, ʿUmar ibn Mūsā ibn Wajīh al-Wajīhī, al-Walīd ibn Abī Thawr, Sharīk, Abū ʿAwānah, his freedman Yazīd ibn ʿAṭāʾ al-Yashkurī, Ḥammād ibn Salamah, Abū al-Aḥwaṣ, Zuhayr ibn Muʿāwiyah, ʿUmar ibn ʿUbayd, Qays ibn al-Rabīʿ, Isrāʾīl, Asbāṭ ibn Naṣr, Ibrāhīm ibn Ṭahmān, and others besides.
Among the earlier authorities are al-Aʿmash and Ibn Abī Khālid.
ʿAlī ibn al-Madīnī said: “He has around two hundred hadiths.”
Ḥammād ibn Salamah narrated from him that he said: “I met eighty of the Companions of the Prophet ﷺ. My eyesight had gone, so I supplicated Allah, Exalted is He, and He restored it to me.”
Abū Bakr ibn ʿAyyāsh related: “I heard Abū Isḥāq al-Sibīʿī say: ‘Hold fast to ʿAbd al-Malik ibn ʿUmayr and Simāk ibn Ḥarb.’”
Sufyān al-Thawrī said: “Not a single hadith of Simāk ibn Ḥarb has been lost.”
Aḥmad ibn Ḥanbal said: “His narrations are more sound than those of ʿAbd al-Malik ibn ʿUmayr.”