The World Federation One Stop Fiqh

Ruling 220

If the body, clothing, or something else like a utensil or carpet becomes impure, and if it is in the possession of a Muslim who is bāligh – or [at least] a Muslim who is able to discern between what is pure and what is impure – and that Muslim moves out of sight [with the impure object], then, in the event that one deems it rationally probable that he has washed it, it is pure.