Shama'il Muhammadiyah #396

'Asim ibn Kulaib’s father heard Abu Huraira say: “Allah’s Messenger (Allah bless him and give him peace) said: ‘If someone sees me in his sleep, he has indeed seen me, for Satan cannot imitate me!’ The father then related this to Ibn Abbas, saying that he had seen the Prophet. He also mentioned al-Hasan ibn ‘Ali, noting that he resembled the Prophet. To this Ibn 'Abbas replied, ‘Yes, he resembled him.’”