Hariz, from Muhammad ibn Muslim, from Abu Ja’far عليه السلام, peace be upon him:
(Imam عليه السلام was asked) regarding ‘a man who is unconscious for days.’ Imam عليه السلام said: “He does not repeat anything of his prayer.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 313