Commerce: Articles of Slaves
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Genesis 37:28, 36
So when the Midianite traders passed by, his brothers pulled Joseph out of the pit and sold him for twenty shekels of silver to the Ishmaelites, who took him to Egypt. / Meanwhile, the Midianites sold Joseph in Egypt to Potiphar, an officer of Pharaoh and captain of the guard.
Deuteronomy 24:7
If a man is caught kidnapping one of his Israelite brothers, whether he treats him as a slave or sells him, the kidnapper must die. So you must purge the evil from among you.