And the Midianites sold him into Egypt unto Potiphar, an officer of Pharaoh's, and captain of the guard.
-- Gen. 37:36 (KJV)
Joseph was now a slave in another country. In ancient times, Africa was entirely inhabited by Black people. That means that Black people were the ones that implemented slavery on a worldwide scale. They sowed it and are now reaping it thousands of years later.
Numerical Analysis: The numerical pattern for this verse is 1,9,3,7,6. (1) To follow God, stay out of human trafficking. (9) Overturn evil in order to have authority. (3) Stay in the Spirit in order to have authority. (7) Be perfected by God in order to become a leader. (6) Expose evil in order to become a leader.