Is pemission of slave's family necessary for marriage?

> And whoever among you cannot [find] the means to marry free, believing > women, then [he may marry] from those whom your right hands possess of > believing slave girls. And Allah is most knowing about your faith. You > [believers] are of one another. **So marry them with the permission of > their people** and give them their due compensation according to what > is acceptable. [They should be] chaste, neither [of] those who commit > unlawful intercourse randomly nor those who take [secret] lovers. But > once they are sheltered in marriage, if they should commit adultery, > then for them is half the punishment for free [unmarried] women. This > [allowance] is for him among you who fears sin, but to be patient is > better for you. And Allah is Forgiving and Merciful.Quran 4:25 What is the meaning of part in bold. Does it mean get permission of parents of slave girl?