How I can prevent family members from selling ancestral land

Hello Sir/Madam, I am looking for legal options that are available to prevent sell of ancestral agricultural land by other family members. To receive best consultation I would like to provide additional details below: We are two brother and my parents are still alive. My elder brother & also father is somehow wanted to sell agricultural lands we own in my absence. And, they have already sold some part of land in past for various reasons such as repair/extension of house/marriage of brother's. which i never object. They also keep all the earning from agricultural yield and we don't have any objection till date on this matter. However selling of land is cause of concern for me since it was ancestral property which my father got from grandfather. I tried to settle this matter with discussion but I was not able to convince them on not selling it. Just in case if it helps, I provide monetary support to my parents all the time for their illness and smaller financial needs. Please note that land is located in maharshtra and it is an agricultural land. Could you please advice me whether I can resolve this issue legally or not? If yes then can you please provide brief description on legal options that I can avail them to stop selling the ancestral land.