Is it permissible for a son who worked on his father’s land and spent his own money on it for 10 years to ask his father for compensation for what he spent, or for him to be granted a portion of the land in exchange for what he lost?

If it is customary to waive compensation and no wage has been agreed upon, then the son has no right to demand wages for his work with his father. However, if they agreed upon a wage, or if it was customary, then he has the right to demand it.

As for the money he spent on the land, if he spent it as a donation, he has no right to demand it back. But if he spent it with the intention of being reimbursed, then he has the right to demand it. It is advisable to refer to the scholars of the land regarding matters where customs and traditions are considered.