And through this chain of narrators, from Muhammad ibn Ya‘qub, from ‘Ali ibn Ibrahim, from his father, from Ibn Abi ‘Umayr, from some of our companions, from Abu ‘Abdullah عليه السلام:
Imam عليه السلام said regarding the turban (Imamah) for the deceased. Imam عليه السلام said: "Wrap it under his chin (Hannikhu)."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 327