People will be Grouped on the Day of Qiyaamah

عن أبي هريرة رضي الله عنه قال قال رسول الله صلى الله عليه و سلم ما من داع يدعو إلى شيء إلا وقف يوم القيامة لازما لدعوته ما دعا إليه وإن دعا رجل رجلا رواه ابن ماجه ورواته ثقات (الترغيب والترهيب 1/116)

Hadhrat Abu Hurayrah (Radhiyallahu Anhu) reports that Rasulullah (Sallallahu Alaihi Wasallam) said: “The one who used to invite people towards anything (or deed, whether good or bad) in the world, on the day of Qiyaamah he will remain firmly joined to those people whom he used to invite (and they responded to his invitation), even though a person had invited just one person (he will be made to stand with him i.e. The person whom he had invited towards any deed, whether good or bad, he will be made to stand with such a person).”