Garudapurana 1.96.2

1.96.2

jāto 'mbaṣṭhastu śūdrāyāṃ niṣādaḥ parvato 'pi vā /
māhiṣyaḥ kṣattriyājjāto vaiśyāyāṃ mlecchasaṃjñitaḥ //

an Ambaṣṭha is born; and upon a śūdra woman, a Niṣāda or Pāraśava.
A Māhiṣya is born of a kṣatriya upon a vaiśya woman, termed an outcast;