Shiva Purana
अथ चेद्वारुणं कर्तुमशक्तः शुद्धवाससा ॥ आर्द्रेण शोधयेद्देहमापादतलमस्तकम् ॥ १३ ॥
If one is unable to take water-bath, one shall take a wet cloth and wipe the body from foot to head.
english translation
atha cedvAruNaM kartumazaktaH zuddhavAsasA ॥ ArdreNa zodhayeddehamApAdatalamastakam ॥ 13 ॥
hk transliteration by Sanscript