Sahih Bukhari Volume 8, Book 76, Hadith Number 560.

Narated By Sahl bin Sa’d : Allah’s Apostle said, “Seventy thousand or seven hundred thousand of my followers will enter Paradise. (Abu Hazim, the sub-narrator, is not sure as to which of the two numbers is correct.) And they will be holding on to one another, and the first of them will not enter till the last of them has entered, and their faces will be like the moon on a full moon night.”