Rabee (rahimahullaah) said: I heard Shaafiee (rahimahullaah) saying: Had it not been for Sufyaan and Maalik (Bin Anas), the knowledge of the hijaaz would have gone away. [Tahdheeb Al-Kamaal: 11/189]

Ibn Wahb (rahimahullaah) said: I do not know anyone more knowledgeable about tafseer than Sufyaan Ibn Uyaynah.  (Imaam) Ahmad (rahimahullaah) said: I do not know anyone more knowledgeable about the Sunan than him.  [Taareekh Al-Islaam: 13/193]

Ahmad Bin Abil Hawaaree (rahimahullaah) said: I said to Sufyaan, ‘’what is Zuhd in the worldly life?  He said: you are thankful when favoured and patient when put to trial.  That is zuhd. [Siyar A’laam Nubulaa:8/468]

Abee Mamar (rahimahullaah) said: Sufyaan Bin Uyaynah (rahimahullaah) said to us: The scholar is not the one who knows good and bad; rather the scholar is the one who knows good and follows it, and he knows evil and avoids it.’’ [Hilyatul Awliyaa: 7/274]