Musannaf Ibn Abi Shayba 3:5600

'Umar ibn Ayyub narrated to us, from Ja'far ibn Burqan, from Abu Hamzah, the freed slave of al-Muhallab, that he prayed beside Sa'id ibn Jubayr. When he said, "Not of those who have evoked [Your] anger or of those who are astray," he said, "Amin," or something to that meaning.