Exodus 21:5-7

New Century Version

⁵ “But if the slave says, ‘I love my master, my wife and my children, and I don’t want to go free,’ ⁶ then the slave’s master must take him to God. The master is to take him to a door or doorframe and punch a hole through the slave’s ear using a sharp tool. Then the slave will serve that master all his life.

⁷ “If a man sells his daughter as a slave, the rules for setting her free are different from the rules for setting the male slaves free.