The first thing that is asked in your presence is that whenever we go somewhere we travel by bus. Often the buses are rushed with passengers and when they enter and exit often they make the clothes and shoes dirty. Is it enough to just brush off them or is it necessary to wash them to purify them? Kindly relieve me from this worry. Thanks. Wassalam.
It is not necessary to wash the clothes if the impurity/dirt is not found outwardly, just brushing off is sufficient.
Allah knows best