Narrated by Muhammad ibn Al-Husayn, from Muhammad ibn Yahya Al-Khazzaz, from Ghiyath, from Imam Al Ja’far عليه السلام, from his father Imam Al Baqir عليه السلام:
Imam عليه السلام disliked entering the restroom while carrying a white dirham (minted with name of Allah سبحانه وتعالى) unless it was tied up.
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 374