Charak Samhita
दर्वीकरकृतो दंशः सूक्ष्मदंष्ट्रापदोऽसितः । निरुद्धरक्तः कूर्माभो वातव्याधिकरो मतः ॥१२७॥
[Characteristics of darvikara snake bite] The bite by the darvikara sarpa is characterized by minute fang marks, is black, there is absence of bleeding, swelling having the shape of back of a tortoise and it produces several disorders due to aggravation of vata.
english translation
darvIkarakRto daMzaH sUkSmadaMSTrApado'sitaH । niruddharaktaH kUrmAbho vAtavyAdhikaro mataH ॥127॥
hk transliteration by Sanscript