Arthashastra
नाग वृक्षो लिकुचो बकुलो वटश् च योनयः ॥
Nágavriksha (a species of a tree), Likucha (Artocarpus Lakucha), and Vakula (Mimusops Elengi), and Vata (Ficus Indica) are the sources (of their fibres).
english translation
nAga vRkSo likuco bakulo vaTaz ca yonayaH ॥
hk transliteration by Sanscript