From him, from Safwan, from Mu'alla Abu Uthman, from Mu'alla ibn Khunays:
Abu Abdillah عليه السلام, peace be upon him, said: "The end of the time for the night prayer (Isha) is midnight."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 280