Mahabharata 7.165.16

सोऽतिष्ठदाहवे यत्तो विधूम इव पावकःक्षत्रियाणामभावाय ब्राह्ममात्मानमास्थितः

so'tiṣṭhadāhave yatto vidhūma iva pāvakaḥkṣatriyāṇāmabhāvāya brāhmamātmānamāsthitaḥ

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