As cotton, when it comes into contact with fire, is burnt off without a residue, so the sins of the person that has bathed in Ganga become perfectly consumed.
अग्नौ प्रास्तं प्रधूयेत यथा तूलं द्विजोत्तम। तथा गङ्गावगाढस्य सर्वपापं प्रधूयते॥