Sunan Ibn Majah, Volume 5, Book 35, Hadith 3900 (DarusSalam) ⓘ
It was narrated from ‘Abdullah that the Prophet said: “Whoever sees me in a dream, has seen me in reality, for Satan cannot appear in my form.”
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ أَبِي إِسْحَاقَ، عَنْ أَبِي الأَحْوَصِ، عَنْ عَبْدِ اللَّهِ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " مَنْ رَآنِي فِي الْمَنَامِ فَقَدْ رَآنِي فِي الْيَقَظَةِ فَإِنَّ الشَّيْطَانَ لاَ يَتَمَثَّلُ عَلَى صُورَتِي " .
also referenced under: Hadith 3900 (Reference) & Book 35, Hadith 8 (In-Book)