Matsya Purana — Inquiry into Yayāti’s Story and the Kacha–Devayānī Episode
अब्राह्मणं कर्तुमिच्छन्ति रौद्रा एभिर् व्यर्थं प्रस्तुतो दानवैर्हि तत्कर्मणाप्यस्य भवेदिहान्तः कं ब्रह्महत्या न दहेदपीन्द्रम् //
abrāhmaṇaṃ kartumicchanti raudrā ebhir vyarthaṃ prastuto dānavairhi tatkarmaṇāpyasya bhavedihāntaḥ kaṃ brahmahatyā na dahedapīndram //
These fierce Dānavas wish to make me a non-Brahmin; therefore it is futile to reason with them. By that deed their end will come even here; whom would the fire of the sin of Brahmin-slaying (brahmahatyā) not burn—Indra himself included?