Abu Hatim al-Razi: The most noble of the Tabi'een, and the most knowledgeable about Abu Hurairah, and once: There is no one more noble among the Tabi'een than him
Abu Hatim ibn Hibban al-Busti: One of the leaders of the Tabi'een in jurisprudence, religion, piety, knowledge, worship, and virtue. He was the master of the Tabi'een and the most knowledgeable of the people of the Hijaz, and the best interpreter of dreams. He did not miss the call to prayer for forty years except when he was in the mosque waiting for it, and it is said that he was one of those who reconciled between Uthman and Ali
Abu Zur'a al-Razi: Trustworthy Imam
Abu Abd Allah al-Hakim al-Naysaburi: Trustworthy
Ahmad ibn Hanbal: Someone like him is trustworthy and one of the best people, and once: The best of the Tabi'een, and once: His mursal reports are authentic
Ahmad ibn Salih al-Jili: A righteous and knowledgeable man
Ibn Hajar al-'Asqalani: One of the most knowledgeable and greatest jurists of the second generation. They agreed that his mursal reports are the most authentic
Ibn Shihab al-Zuhri: The most knowledgeable person I have ever met
Al-Dhahabi: Trustworthy, authoritative, jurist, and once: The head, the unique, and the most excellent of the Tabi'een's scholars and jurists
Al-Qasim ibn Muhammad: Sa'id is the most knowledgeable and best of us
Al-Mizzi: The master of the Tabi'een
Sulayman ibn Musa al-Ashdaq: The most knowledgeable of the Tabi'een
Abd al-Hamid ibn Maymun al-Ruqi: I arrived in Medina and asked about the most knowledgeable people of Medina, and they directed me to Sa'id ibn al-Musayyib
Abdullah ibn Umar: By Allah, he is one of the muftis
Ali ibn al-Madini: I do not know anyone among the Tabi'een with more extensive knowledge than him, and he is, in my opinion, the greatest of the Tabi'een
Qatada ibn Di'amah al-Sadusi: I have never seen anyone more knowledgeable about what is lawful and unlawful than him
Malik ibn Anas: Sa'id ibn al-Musayyib never felt lonely except when he disagreed with someone
Muhammad ibn Idris al-Shafi'i: His mursal reports are considered good by us, and once: His mursal reports are authentic
Muhammad ibn Yahya al-Ansari: The head of the people of Medina in his time, and it is said: The jurist of jurists
Makhul al-Shami: I travelled throughout the lands in pursuit of knowledge, and I did not find anyone more knowledgeable than him, and once: The most knowledgeable person I have ever met
Yahya ibn Ma'in: His mursal reports are more preferable to me than the mursal reports of al-Hasan, and in a narration by Ibn Mahriz: Malik ibn Anas said, Sa'id ibn al-Musayyib never heard anything directly from Umar