Devimahatmya or Saptashaticandi 24.41

Devīmāhātmya or Saptaśatīcaṇḍī 24.41

vaivasvate'ntare prāpte aṣṭāviṃśatime yuge
śumbho niśumbhaścaivānyāvutpatsyete mahāsurau