Yuga-Vibhāga and Kāla-Pramāṇa
Measures of Time and the Four Yugas
आसन्मन्त्रा व्यतीतेषु ये कल्पेषु सहस्रशः / ते मन्त्रा वै पुनस्तेषां प्रतिभायामुपस्थिताः
āsanmantrā vyatīteṣu ye kalpeṣu sahasraśaḥ / te mantrā vai punasteṣāṃ pratibhāyāmupasthitāḥ
The mantras that had existed through thousands of bygone kalpas—those very mantras again arose within their inspired insight.