ṚV, 10, 105, 11.1 śataṃ vā yad asurya prati tvā sumitra itthāstaud durmitra itthāstaut /

Aṣṭāvakragīta, 3, 7.1 udbhūtaṃ jñānadurmitram avadhāryātidurbalaḥ /