While He was wandering about, a wild forest fire began. This fire was caused by the friction of bamboos, which were being blown by the wind. In that fire, the entire forest near Kuṭakācala and the body of Lord Ṛṣabhadeva were burnt to ashes.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अथ समीरवेगविधूतवेणुविकर्षणजातोग्र- दावानलस्तद्वनमालेलिहानः सह तेन ददाह
atha samīravegavidhūtaveṇuvikarṣaṇajātogra- dāvānalastadvanamālelihānaḥ saha tena dadāha
SB 5.6.8