Shama-il Tirmidhi Chapter 55, Hadith Number 3 (391).
A question may arise that different people in different towns, and different countries see Sayyidina Rasullullah Sallallahu’Alayhi Wasallam at the same moment in their dreams. How can Sayyidina Rasulullah Sallallahu’Alayhi Wasallam be present at different places at one moment. This view carries no weight because it is not necessary that if many people see him at one time or moment, he is present everywhere, but it is possible that different people can see him at one place. It is like the sun which is in no one place and many people see it from many towns which are a distance from one another. Also whatever colour of spectacles are worn, red, green, etc. to see the sun, the sun will appear in that colour, despite the sun having its original colour and form.