Sunan Ibn Majah
3904
Sahih+3

It was narrated from ‘Awn bin Abu Juhaifah, from his father, that the Messenger of Allah (ﷺ) said:“Whoever sees me in a dream, it is as if he has seen me when he is awake, for Satan is not able to resemble me.”

SahihAl-Albani
Hasan SahihMuhammad Fouad Abd al-Baqi