Al-Hasan, from Zuraa, from Samaa, who said:
I (narrator) asked Imam عليه السلام about ‘a sick person who becomes unconscious.’ Imam عليه السلام said: “If it is less than three days, then there is no making up upon him; and if he is made unconscious for three days, then upon him is the making up of the prayer in them.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 314