Maliks Muwatta Book 52, Hadith Number 1.

Yahya related to me from Malik from Ishaq ibn Abdullah ibn Abi Talha al-Ansari from Anas ibn Malik that the Messenger of Allah, may Allah bless him and grant him peace, said, “The good dream of a man who is salih is a forty-sixth part of prophecy.”

Yahya related the like of that to me from Malik from Abu’z-Zinad from al-Araj from Abu Hurayra from the Messenger of Allah, may Allah bless him and grant him peace.