Abu Hatim ibn Hibban al-Busti: One of the worshippers of the people of al-Sham and their pious, he used to swear by Allah and He would grant him, and when he left his house he would put his right hand on his left out of fear of pride. He narrates from Ubadah ibn al-Samit and Abu al-Darda. Khalid ibn Ma'dan narrated from him, and he was one of the worshippers.
Ibn Hajar al-Asqalani: Trustworthy, worshipper, one of the senior Tabi'een
Ibn Abd al-Barr al-Andalusi: They agreed that he is one of the trustworthy scholars
Al-Dhahabi: One of the worshippers and pious of the Tabi'een, and he is a Mukhadram
Mujahid ibn Jabr: I have not seen anyone more knowledgeable than him after Ibn Abbas
Muhammad ibn Sa'd, the scribe of al-Waqidi: Trustworthy, narrated few hadith