Imam Ja‘far al-Ṣadiq (as): Every single angel in the heavens and on the earth asks Allah, Mighty and Exalted, for permission to visit the grave of Hussain (AS) such that there is always a company of them descending upon Karbala and a company thereof ascending to heavens [after they finish visiting the grave of Hussain]. Kāmil a-Ziyārāt