Ahmad ibn Muhammad, from al-Husayn ibn Said, from some of our companions, from Abu Abdillah عليه السلام, peace be upon him, who said:
Imam عليه السلام said: “Do not give anyone less than one head’s share.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 112