The Bible does not permit slavery.
Yes it does!
Exo 21:4 If his master have
given him a woman, and she have born him sons or daughters;
the woman and her children shall be her master's, and he shall go out by himself.
Lev 25:45 Moreover of
the children of the strangers that do sojourn among you,
of them shall ye buy, and of their families that
are with you, which they begat in your land: and
they shall be your possession.
Lev 25:46 And you shall
take them for inheritance to your sons after you,
to hold for a possession; you may enslave them forever. But on your brothers, the sons of Israel, one over another
, you shall not rule over him with severity.
Lev 22:10 There shall no stranger eat
of the holy thing: a sojourner of the priest, or an
hired servant, shall not eat
of the holy thing.
Lev 22:11
But if the priest buy any person with his money, he shall eat of it, and he that is born in his house: they shall eat of his meat.
Note that in 22:10 they have a
hired servant – a sakiyr. -- In 20:11 it is a
bought slave.
I might add that Concubines, which they could possess, are bought SEX SLAVES.
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