question #1 Sahih Muslim 219, Book 1, Hadith 432 : What is the significance of the number of people entering Paradise together in Islamic teachings?

Seventy thousand persons or seven hundred thousand persons (Abu Hazim does not remember the exact number) would enter Paradise holding and supporting one another, and the first among them would not enter till the last among them would enter (therein) ; (they would enter simultaneously) and their faces would be bright like the full moon.