Valmiki Ramayana Sundara Kanda Sarga 54 Shloka 32

विधूमरश्मिः shining without smoke, भवनेषु in the mansions, सक्तः attached with रक्षःशरीराज्यसमर्पितार्चिः fat of the demons body adding, अग्निः fire, समारुतः fanned by the wind, दिविस्पृक् shot up into the sky, युगान्तकालानलतुल्यवेगः spreading fast just as the fire with the end of the universe, ववृधे increased.

Fanned by the wind, inflamed by the fat from the corpses of the demons, the fire spread in the mansions burning without smoke. It spread with great speed like the fire at the end of the universe.