Musnad Abu Ya'la al-Mawsili 161:58

'Amr ibn Muhammad al-Naqid narrated to us, al-Khidr ibn Muhammad al-Harrani narrated to us, Muhammad ibn Salamah narrated to us, from Muhammad ibn Ishaq, from Abu al-Zinad, from al-A'raj, from Sulayman ibn 'Urayb, who said: I heard Abu Hurayrah saying to Ibn 'Abbas: The Messenger of Allah (may Allah bless him and grant him peace) said: "The dream of a Muslim is one part of forty parts of prophethood." Ibn 'Abbas said: "One of sixty." Abu Hurayrah said: "I make you hear me saying 'The Messenger of Allah (may Allah bless him and grant him peace) said,' and you say 'One of sixty'?"