I should not be held responsible for what I did while I was ignorant. Kshatriyas always require Brahmanas for assisting them in their acts. These particular Kshatriyas, through fear of Rama, fled to the forests and mountains. They could not, accordingly, find Brahmanas for assisting them. Their children, therefore, fell away from the status of Kshatriyas and became Vrishalas or Sudras.
Then, some of the Kshatriyas, afflicted with the terror of Jamadagni's son, entered mountain-fastnesses, like deer afflicted by the lion. Of them that were unable, through fear of Rama, to discharge the duties ordained for their order, the progeny became Vrishalas owing to their inability to find Brahmanas.