Mahabharata 3.105.25

कपिलं च महात्मानं तेजोराशिमनुत्तमम्तपसा दीप्यमानं तं ज्वालाभिरिव पावकम्

kapilaṃ ca mahātmānaṃ tejorāśimanuttamamtapasā dīpyamānaṃ taṃ jvālābhiriva pāvakam

Our plain-language meaning of this verse is waiting for scholar review.