Cross reference
Joel 2:29
29 And also on the men-servants, and on the maid-servants, In those days I do pour out My Spirit.
1 Corinthians 12:13
13 for also in one Spirit we all to one body were baptized, whether Jews or Greeks, whether servants or freemen, and all into one Spirit were made to drink,
Galatians 3:28
28 there is not here Jew or Greek, there is not here servant nor freeman, there is not here male and female, for all ye are one in Christ Jesus;
Colossians 3:11
11 where there is not Greek and Jew, circumcision and uncircumcision, foreigner, Scythian, servant, freeman -- but the all and in all -- Christ.