Shama-il Tirmidhi Chapter 55, Hadith Number 7 (395).
The ‘ulama have adopted different headings to its meaning. Haafizul Hadith Ibn Hajar has written a very lengthy treatise in his commentary on Bukhaari, wherein he has mentioned the sayings of many ‘ulama. The author of Tabreez has also written in detail on this subject. Mulla ‘Ali Qaari and others have written that this is the best, because it is said to be part of the ‘ilmi nubuwwah (knowledge of prophethood), and the ‘ulum of nubuwwah is particular only to the ambiyaa, therefore, it should be regarded as something special only to them. In brief, it is sufficient to know that a good and blessed dream is a great glad tiding and a portion from the portions of nubuwwah. This is enough for his nobility, greatness and blessedness. Only a nabi can know correctly if it is a forty sixth part of nubuwwah, and he is the only one who can correctly understand how and what this forty sixth portion is.
The discussion of seeing Sayyidina Rasulullah Sallallahu ‘Alayhi Wasallam in a dream ends here. Imaam Tirmidhi ends his kitaab by including two athars, which in reality are advices and also an important warning. The first is that one should not guess and give a ruling. The basis of the deen should be in following Sayyidina Rasulullah Sallallahu ‘Alayhi Wasallam, and therefore in every verdict, Sayyidina Rasulullah Sallallahu ‘Alayhi Wasallam should be obeyed and followed. The second is that the verdict of any ordinary person should not be accepted, the irreligious are not worthy of being followed. In reality both advices are very important.