(Al-Mudasir) 74 : 4
وَثِيَابَكَ فَطَهِّرْ
And you purify your clothes.
That means along with purifying the Soul with Adhikr, the clothes which covers the body should also be cleaned. Lord has taught through His Messenger that cleanliness is part of belief. See explanation 2: 222; 4: 43 and 5: 6.