Sahih Muslim , Book 29, Hadith 5637 (USC-MSA) ⓘ
Abu Qatada reported Allah's Messenger as saying: He who saw me in dream in fact saw the truth (what is true).
وَقَالَ فَقَالَ أَبُو سَلَمَةَ قَالَ أَبُو قَتَادَةَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ رَآنِي فَقَدْ رَأَى الْحَقَّ " .
also referenced under: Book 42, Hadith 25 (In-Book) & Hadith 2267 (Reference)
The above two hadith have been narrated likewise through another chain of transmitters.
وَحَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا ابْنُ أَخِي الزُّهْرِيِّ، حَدَّثَنَا عَمِّي، . فَذَكَرَ الْحَدِيثَيْنِ جَمِيعًا بِإِسْنَادَيْهِمَا سَوَاءً مِثْلَ حَدِيثِ يُونُسَ .
also referenced under: Book 42, Hadith 26 (In-Book) & Hadith 2267 (Reference)