Atharvavedaparishishta 63.1.8

63.1.8

dhṛtatīkṣṇārkakiraṇe prasannā mṛdumaṇḍale | prasnigdhe caikavarṇe ca māṃsale vyaktalakṣaṇe ||

When the sun's rays are sharp, clear, in a soft disc, / glossy, of single color, thick, and with distinct characteristics;