'Slave' in the Bible

For am I now trying to win the favor of people, or God? Or am I striving to please people? If I were still trying to please people, I would not be a slave of Christ.

The law, then, was our guardian until Christ, so that we could be justified by faith.

But since that faith has come, we are no longer under a guardian,

There is no Jew or Greek, slave or free, male or female; for you are all one in Christ Jesus.

Now I say that as long as the heir is a child, he differs in no way from a slave, though he is the owner of everything.

So you are no longer a slave but a son, and if a son, then an heir through God.

For it is written that Abraham had two sons, one by a slave and the other by a free woman.

But the one by the slave was born according to the impulse of the flesh, while the one by the free woman was born as the result of a promise.

Now Hagar is Mount Sinai in Arabia, and corresponds to the present Jerusalem, for she is a slave with her children.

But what does the Scripture say?Drive out the slave and her son, for the son of the slave will never be a coheir with the son of the free woman.

Therefore, brothers, we are not children of the slave but of the free woman.