And he narrated from Safwan ibn Yahya from Hudhayfah ibn Mansur from Abu Ja’far عليه السلام and Abu Abdillah عليه السلام, peace be upon them both:
The Imams عليه السلام said: “The prayer during travel is two rak’ahs, there is nothing before them and nothing after them.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 15