Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 170.24

170.24

kutsitaṃ ca kṛtaṃ karma rājñā caṇḍālacāriṇā /
brāhmaṇo naiva vadhyo hi viśeṣeṇa tapovṛtaḥ //

'A vile deed has been done by the king acting like an outcaste! / Indeed a brāhmaṇa must never be executed, especially one endowed with asceticism!