Afaik it was forbidden to sell lands in Palestine to Jewish people, though I don't think it was that effective in stopping lands being bought out by Jewish people due to weak central authority and worsening economy.

My dude, how on earth could you look at stuff like https://www.ft.com/content/f6b953fc-a6ad-48cd-bed1-d42619b57... and not realize you have completely lost the plot? Seriously...