Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Harith bin Qais that he said Hazrat Abdullah bin Masood instructed me, "Do you wish that Allah places you in the middle of Paradise?" The narrator said, "I replied, 'May I be sacrificed for you, this is exactly what I desire.'" He instructed, "Adhere to the congregation," or he said, "It is obligatory upon people to adhere to the congregation."