'Slaves' in the Bible

However, some men from what was called the Synagogue of the Freedmen (freed Jewish slaves), both Cyrenians and Alexandrians, and some from Cilicia and [the province of] Asia, rose up and questioned and argued with Stephen.

‘And I will judge any nation to whom they will be in bondage,’ said God, ‘and after that they will come out and serve Me [in worship] in this place.’