Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/10/16

राजा मित्रसहः शापाद्गुरो ऋषिवरस्य हि ।। बभूव राक्षसो घोरो हिंसको वनगोचरः ।। १६।।

sanskrit

By the curse of his preceptor the leading sage, the king Mitrasaha became a terrible violent Rākṣasa, roaming in the forest.

english translation

rAjA mitrasahaH zApAdguro RSivarasya hi || babhUva rAkSaso ghoro hiMsako vanagocaraH || 16||

hk transliteration by Sanscript