Mahabharata 5.38.14

नित्यं सन्तः कुले जाताः पावकोपमतेजसःक्षमावन्तो निराकाराः काष्ठेऽग्निरिव शेरते

nityaṃ santaḥ kule jātāḥ pāvakopamatejasaḥkṣamāvanto nirākārāḥ kāṣṭhe'gniriva śerate

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