Hazrat Abu Sadiq (may Allah have mercy on him) narrates that Hazrat Ali (may Allah be pleased with him) said: Islam has three pillars: faith, prayer, and congregation. Thus, prayer will not be accepted without faith. And whoever has faith will perform prayer, and whoever performs prayer will do so with the congregation. And whoever separates himself from the congregation even by a span, he has removed the necklace of Islam from his neck.