Acts 2:18
on my very slaves and slave-girls in those days will I pour out my Spirit, and they shall prophesy.
Acts 21:10
While we remained there for a number of days, a prophet called Agabus came down from Judaea.
1 Corinthians 7:21-22
You were a slave when you were called? Never mind. Of course, if you do find it possible to get free, you had better avail yourself of the opportunity.
Galatians 3:28
There is no room for Jew or Greek, there is no room for slave or freeman, there is no room for male and female; you are all one in Christ Jesus.
Colossians 3:11
In it there is no room for Greek and Jew, circumcised and uncircumcised, barbarian, Scythian, slave, or free man; Christ is everything and everywhere.