Bukhari

Hadith Commentary:
So it will be the Messenger of Allah (sallallahu alayhi wa sallam) himself.

Benefits and Issues:
This is a unique characteristic of the Prophet (sallallahu alayhi wa sallam):
That Satan cannot assume your form.
However, it is possible that he may appear in another form and create the illusion that this is the Messenger of Allah (sallallahu alayhi wa sallam).
Therefore, it is necessary that a person compares the form he saw with those characteristics
which are mentioned in the books of hadith.
Or he should seek confirmation from a person of knowledge.
The late father, Sheikh Abdul Aziz Saeedi rahimahullah, was once told by an innovator, with great enthusiasm and passion, that he had seen the Noble Prophet (sallallahu alayhi wa sallam) in a dream.
When my father asked for details, he replied that he had seen a luminous personality with a white, radiant beard.
My father immediately
recited "La hawla wa la quwwata illa billah" and clarified that you have seen a devil.
In short, the one who sees the Noble Prophet (sallallahu alayhi wa sallam) in a dream will see him while awake on the Day of Resurrection and will attain a special closeness.
Otherwise, other believers will also see you (sallallahu alayhi wa sallam).