Through the same chain of narrators, from Al-Husayn bin Sa‘id, from Safwan, from Al-‘Ala’, from Muhammad bin Muslim, from one of the two Imams عليه السلام, who said:
I asked Imam عليه السلام about wiping over the feet, and Imam عليه السلام said: 'There is no harm.'"
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 67