Musannaf Ibn Abi Shayba 37:344

Ibn ‘Ulayyah narrated to us, from Ayyub, who said: Al-Hasan said to me, "Do you not wonder at Sa’id ibn Jubayr? He entered upon me and asked me about fighting Al-Hajjaj, and with him were some of the leaders," meaning the companions of Ibn al-Ash’ath.