Abu Al-Faraj ibn Al-Jawzi: He mentioned a hadith of his and said: "He is its weakness."
Abu Ja'far At-Tahawi: He is worthy of narration.
Abu Hatim Ar-Razi: The hadiths of the trustworthy narrators from him are upright, there is no problem with him, and only the weak narrators criticize him.
Abu Hatim ibn Hibban Al-Busti: He used to narrate perplexing hadiths from the Companions, and said in Al-Majruhin: "If Ubayd ibn Zahr, Ali ibn Yazid, and Al-Qasim Abu Abdur Rahman are gathered in the chain of narration of a hadith, then the text of that hadith is nothing but what their hands have fabricated."
Abu Isa At-Tirmidhi: Trustworthy
Ahmad ibn Hanbal: Ali ibn Yazid narrates wonders from him, and he said about some hadiths he considered rejected: "I don't see the calamity except from Al-Qasim."
Ahmad ibn Salih Al-Jili: Trustworthy, his hadith is written down, but he is not strong.
Ibrahim ibn Ishaq Al-Harbi: From the trustworthy Muslims
Ibrahim ibn Ya'qub Al-Jawzajani: He was a righteous, excellent man who met forty men from the Muhajirin and the Ansar
Ibn Hajar Al-Asqalani: Truthful, he errs often
Adh-Dhahabi: Truthful
Al-Mufaddal ibn Ghassan Al-Ghalabi: Rejector of hadith
Ali ibn Al-Madini: He was, in our view and in the view of our companions whom we met: Trustworthy
Muhammad ibn Ismail Al-Bukhari: Trustworthy
Authors of Tahrir Taqrib At-Tahdhib: Trustworthy, and more than one of the prominent scholars, such as Al-Bukhari, Abu Hatim, and Ibn Mu'in, have explained that the rejected narrations in his hadith are often from the narration of weak narrators from him.
Yahya ibn Ma'in: Trustworthy, and once: Trustworthy of the trustworthy, they narrate these hadiths from him and do not elevate them.
Ya'qub ibn Sufyan Al-Fasawi: Trustworthy
Ya'qub ibn Shaybah As-Suddi: Trustworthy, and once: People have differed about him, some weaken his narration and some authenticate him.