||If [the master] designates her as a bride for his son, she must be treated exactly the same as any other girl.
Ve'im-livno yi'adenah kemishpat habanot ya'aseh-lah.
||[Similarly], if [the master] marries another wife, he may not diminish [this one's] allowance, clothing or conjugal rights.
Im-acheret yikach-lo she'erah ksutah ve'onatah lo yigra.
||If none of the above three are done [to the girl], then she shall be released without liability or payment.
Ve'im-shlosh-eleh lo ya'aseh lah veyatse'ah chinam eyn kasef.
Or, 'the son.'
Polygamy was permitted by Torah Law. It was only forbidden later by a ban pronounced by all European rabbis under the leadership of Rabbenu Gershom (circa 965-1028).
Redemption, marriage, or marriage to a son (Rashi). The girl then must be released automatically when she reaches puberty.