Who is entitled to the buried treasure found by a hired worker?

Question : This is what Abd al-Rahman al-Bawardi says: If a man hires a farmer, and the farmer finds treasure trove while farming, does it belong to him or to the owner of the farm? Please inform us. Did this happen, al-Bawardi?

Answer : If it happens, he says to him: If it happens, we will inform you. But in any case, the buried treasure belongs to the one who finds it, except for the one who was hired to dig in order to reach it; in that case, it belongs to the one who hired him. As for if that is not the case, it belongs to the one who finds it. Do you understand now? Good, make us a partner in what he found.