Sa’ad ibn Abdillah, from Muhammad ibn al-Husayn, from Muhammad ibn Sinan, from al-Ala ibn Razin, from Muhammad ibn Muslim, from one of the two Imams عليه السلام, peace be upon them: The same as that.
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 3, p. 353