Sahih Muslim 72

Ubayd Allah bin Mu’ādh al-Anbarī narrated to me, my father narrated to us, he said: ‘I wrote to Shu’bah asking him about Abū Shaybah , a judge of Wāsit, so he wrote to me: ‘Do not write anything from him [of Ḥadīth] and tear up my letter [to you about this]’.