Ramayana
यदुस्तु जनयामास यातुधानान्सहस्रशः । पुरे क्रौञ्चवने दुर्गे राजवंशबहिष्कृतः ॥ 7-59-20 ॥
But Yadu, who had been cast out from the royal line, begot Yatudhanas (rakshasas) by the thousands in the impregnable city set in the Krauncha forest.
english translation