Reference: Sharh ‘Umdatil-Fiqh – Tape 1, Question No.8
Question: If my clothing is soiled with an impurity, and I only have coffee and no water [to purify it with], should I purify my clothing with coffee?
Response: Coffee cannot [be used to] purify. However, if your clothing is soiled with an impurity and you do not have any water to purify it with, then pray [as you are]. There is no harm [in praying] even if there is an impurity on your clothing because [at the time of prayer] there was nothing more you could do. [Most importantly], you must not miss the prayer.
