Sufyan bin ‘Uyaynah informed us, he said: Zuhri informed me. Then when we stood up (from the gathering), ‘Umar bin Qais, who was present with me in the gathering, said to me that he is Sa‘id bin al-Musayyib. I asked Sufyan (may Allah have mercy on him): “Did you have doubt when Sa‘id bin al-Musayyib (may Allah have mercy on him) informed you?” He replied: “No, it is exactly as he said, but he made me doubtful.”
Hadith Referenceمسند الإمام الشافعي / كتاب القضاء والأحكام والدعاوى والبينات واليمين ومع الشاهد والأيمان والشهادات / 1704
Hadith Takhrijاسناده صحيح : أخرجه البيهقي : 10 / 152 - وفى المعرفة السنن والآثار له (5891)۔