Chapter on the Prayer of the Two Eids

And Muhammad ibn Ali ibn Mahbub narrated from Ahmad ibn Muhammad from al-Husayn ibn Said from Fadalah from Ibn Sinan from Abu Abdillah عليه السلام, peace be upon him: (A similar narration) And Imam al-Sadiq عليه السلام added, saying: “On the Day of Arafah, they gather without an Imam in the cities ('amsar') to supplicate to Allah سبحانه وتعالى, the Exalted, the Mighty and Majestic.”