sell one's soul

Etymology
From the medieval legend of Faust, who made a contract with the devil, exchanging his soul for worldly gains.

Verb

 * 1)  To abandon one's spiritual values or moral principles for wealth or other benefits.

Translations

 * Finnish: myydä sielunsa
 * French:
 * Polish: sprzedać własną matkę
 * Russian: прода́ть ду́шу
 * Scottish Gaelic: reic anam ris an Donas