Abu Ahmad ibn Adi al-Jurjani: His hadith is well-supported.
Abu Hatim al-Razi: He is alright.
Abu Hatim ibn Hibban al-Busti: Trustworthy and reliable.
Abu Hafs Umar ibn Shahin: The disagreement between Ahmad and Yahya is not in Sulaiman ibn Dawud, but rather in the hadith.
Ahmad ibn Abi Khaithamah al-Nasai: He is not anything (meaning not reliable).
Ahmad ibn Hanbal: I hope that his hadith is Sahih, and once: He is not anything (meaning not reliable).
Ibn Hajar al-'Asqalani: There is no doubt that he is trustworthy.
Al-Dhahabi: He is disagreed upon.
Abdullah ibn Ahmad al-Dawraqi: An old Shami sheikh who is weak.
Ali ibn al-Madini: He is a rejector of hadith, and he weakened him.
Muhammad ibn Isma'il al-Bukhari: He mentioned a hadith of his and said: There is something to consider about it.
Yahya ibn Hamzah al-Hadrami: He narrated from him good hadiths as if they were upright.
Yahya ibn Ma'in: He is not anything (meaning not reliable), he is not known and his hadith is not Sahih.