Charak Samhita
शिखिबर्हविचित्रार्चिस्तीक्ष्णाक्षमरूक्षकुणपधूमश्च । स्फुटति च सशब्दमेकावर्तो विहतार्चिरपि च स्यात् ॥१०९॥
The smoke which comes out of such fire is sharp, intolerable and dry, and it smells like a corpse. The flame which comes out makes a cracking noise; it moves spirally or it gets extinguished.
english translation
zikhibarhavicitrArcistIkSNAkSamarUkSakuNapadhUmazca । sphuTati ca sazabdamekAvarto vihatArcirapi ca syAt ॥109॥
hk transliteration by Sanscript