 यमेवाधातुमिच्छन्ति तापसा स्सततं वने।तस्यासौ दृश्यते धूम स्सङ्कुलः कृष्णवर्त्मनः।। 
 Here is the thick smoke emanating from the blacktrailed fire maintained perpetually by the ascetics living in the forest. 