From him, from Faddalah, from Ibn Sinan, from more than one person:
Abu Abdillah عليه السلام, peace be upon him, said: "If forgetfulness becomes frequent for you, then proceed with your prayer."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 369