योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-67, verse-46

अहं किमिति शब्दार्थवेदनाभोगसंविदम् ।
संविदं तत्त्वशब्दार्थं जीवः पश्यति सार्थकम् ॥ ४६ ॥

ahaṃ kimiti śabdārthavedanābhogasaṃvidam ,
saṃvidaṃ tattvaśabdārthaṃ jīvaḥ paśyati sārthakam 46

46. The wakeful living god (who had no twinkling of his eyes), whereby we measure time was yet conscious of its course by means of his thoughts; and had the notion of a brilliant icicle of the form of the future mundane egg in his mind. See Manu's Genesis of the World. I.