Arthashastra
एतेन एव कल्पेन विद्युद् दग्धस्य वृक्षस्य कीलका व्याख्याताः ॥
The same process of smearing and burying holds good with the bolt-like pieces (kílaka) prepared from vidyuddanda tree.
english translation
etena eva kalpena vidyud dagdhasya vRkSasya kIlakA vyAkhyAtAH ॥
hk transliteration by Sanscript