Natyashastra
एवं निर्गीतमेतत्तु दैत्यानां स्पर्धया द्विजाः । देवानां बहुमानेन बहिर्गीतमिति स्मृतम् ॥ ४१॥
"Thus, this song, performed with the rivalry of the demons, is remembered as an external song that is honored by the gods and esteemed by the twice-born (Brahmins)."
english translation
evaM nirgItametattu daityAnAM spardhayA dvijAH । devAnAM bahumAnena bahirgItamiti smRtam ॥ 41॥
hk transliteration by Sanscript