Bhagavatapurana 10.89.49.p1

10.89.49.p1

tamaḥ su-ghoraṃ gahanaṃ kṛtaṃ mahad $ vidārayad bhūri-tareṇa rociṣā &

51. That Sudarsana or Chakra, quick as thought, passed through, breaking up by its enormous light, the thick and terrible and pervading darkness, just as Rama's shafts discharged from His bow string penetrated (enemies') armies.