The power of a father to sell his daughter into slavery is expressly mentioned in the Law Exodus 21:7. The power to sell a son appears from this passage. In either case, the sale held good for only six years, or until the next year of jubilee (see the marginal references).
Related Commentaries of Nehemiah 5:5
Nehemiah 5:5
5 Yet now our flesh is as the flesh of our brethren, our children as their children: and, lo, we bring into bondage our sons and our daughters to be servants, and some of our daughters are brought unto bondage already: neither is it in our power to redeem them; for other men have our lands and vineyards.