maglincer your referance to exodus 21:7-11 confirms what i stated, that the bible does not condone slavery but knowing how man would act provisions were made to protect slaves.
In the patriarchal society, daughters had certain rights, responsibilities, and also limitations. They were assigned various chores. Priests daughters ate from the priestly portions of sacrifices. (Ge 24:16, 19,20; 29:6-9; Le 10:14) A daughter was the property of her father until he gave her in marriage (Jos 15:16,17; 1Sa 18:17, 19,27), and as such she could even be used as security or sold into slavery, though not to a foreigner. (Ex 21:7-10; Ne 5:2-5) Until she was married, her vows were subject to her fathers annulment. (Nu 30:3-5) A father could not lawfully make her a prostitute, and if she were violated, he could collect damages. (Ex 22:16,17; Le 19:29; De 22:28,29) There are instances where fathers offered their virgin daughters to depraved mobs in order to protect their guests. (Ge 19:6-8; Jg 19:22-24) Daughters were sometimes given an inheritance along with their brothers, but in the case of the five daughters of Zelophehad whose father died without sons, they received the entire inheritance of their forefathers, on the condition that they marry sons of Manasseh so that the property would remain in the same tribe. (Nu 36:1-12; Jos 15:19; Job 42:15) If a daughter was divorced or widowed, she could come back into her fathers household
