Charak Samhita
दष्टमात्रो दशेदाशु तं सर्पं लोष्टमेव वा । उपर्यरिष्टां बध्नीयाद्दंशं छिन्द्याद्दहेत्तथा ॥२५१॥
Immediately after a snake bite, the person should bite the snake itself if possible or otherwise bite a clod of earth. Thereafter a tourniquet should be tied above the site of bite and the place of bite should be incised as well as cauterized.
english translation
daSTamAtro dazedAzu taM sarpaM loSTameva vA । uparyariSTAM badhnIyAddaMzaM chindyAddahettathA ॥251॥
hk transliteration by Sanscript