Exodus 21:16, 20-21

“If someone kidnaps a person, the penalty is death, regardless of whether the person has been sold or is still held in possession.

“If a slave owner hits a slave, male or female, with a stick and the slave dies on the spot, the slave must be avenged. But if the slave survives a day or two, he’s not to be avenged—the slave is the owner’s property.