My old testament is correct. Levirate Marriage was given by god in Deuteronomy 25:5-6. Also, Deuteronomy 22:28-29 is where a woman who is raped must marry her rapist. Exodus 21:4 shows where a slave owner can arrange marriages between slaves. God remained silent regarding Jacob and his 2 wives, Abraham having children with his wife and her slave, or with Moses telling soldiers that they can marry virgin prisoners of war. Perhaps one should read the OT more thoroughly before claiming others are ignorant.