The Code of Hammurabi

And if a slave of the palace or the slave of a poor man has taken to wife the daughter of a gentleman and, when he married her, with a marriage portion from her father's house she entered into the house of the slave of the palace, or of the slave of the poor man, and from the time that they started to keep house and acquired property, after either the servant of the palace or the servant of the poor man has gone to his fate, the daughter of the gentleman shall take her marriage portion, and whatever her husband and she from the time they started have acquired one shall divide in two parts and the owner of the slave shall take one-half, the daughter of a gentleman shall take one-half for her children. If the gentleman's daughter had no marriage portion, whatever her husband and she from the time they started have acquired one shall divide into two parts, and the owner of the slave shall take half, the gentleman's daughter shall take half for her sons.