Hadith.738 – Zurarah asked Imam Muhammad ibn Ali Al-Baqir عليه السلام about a cushion (shadhakunah) that may have come into contact with major ritual impurity (janabah) and whether it is permissible to pray on it while it is in a carriage (mahmil).
Imam عليه السلام said: "There is no harm in praying on it."