Mahabharata 3.31.34

यथा काष्ठेन वा काष्ठमश्मानं चाश्मना पुनःअयसा चाप्ययश्छिन्द्यान्निर्विचेष्टमचेतनम्

yathā kāṣṭhena vā kāṣṭhamaśmānaṃ cāśmanā punaḥayasā cāpyayaśchindyānnirviceṣṭamacetanam

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