Imam Sadiq (a.s.) informed Muawiyah b. Wahab: ‘O Muawiyah! Do not let fear make you abandon the Ziyaarat of Imam Husain’s shrine. Certainly, the one who abandons his Ziyaarat will (one day) regret what he missed out. Don’t you want to see Allah gather you amongst those for whom none other than the Holy Prophet (s.a.w.a.), Imam Ali (a.s.), Hazrat Faatema (s.a.) and the Imams (a.s.) are praying.’
Kaamil al-Ziyaraat p 116