“I was with Ar-Ridha’ (a.s.) when a group of people from Qum entered and greeted him. The Imamgreeted them back and paid his respects to them. Then Ar-Ridha’ (a.s.) told them, ‘You are welcome. You are truly our followers. There will come a time when you will visit my shrine in Toos. Indeed, whoever visits me having already performed the ritual bathing (‘Ghusl) will be purified from all his sins just as the day he was born from his mother.’”