षडङ्गवेदविदुषां क्रतुप्रवरयाजिनाम् | शुश्राव ब्रह्मघोषांश्च स विरात्रे ब्रह्मरक्षसाम् || ५-१८-२
At dawn sounds of recitation of Vedas and the six auxillary sciences, (i.e .grammar, prosody, etymology, phonetics, astronomy and the science of rituals) by the brahmins among demons wellversed in performing exalted sacrificial ceremonies were heard. [5-18-2]