And from him, from Uthman ibn Isa from Sama’ah from Imam عليه السلام, peace be upon him, who said:
Imam al-Sadiq عليه السلام said: “There is no prayer on the two Eids except with a (just) imam. But if you pray alone, then there is no harm.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 3, p. 140