How property division works in joint family 3 sons working independent

Here is the situation. If there is a joint family having 3 sons working independently. The eldest son had bought lands in name of parents. But when the eldest son had made a property for his own family...the parents turned against him (I don't know whether this is common). I just wanted to know the law and how it works. The parents of them says that they will make sure that eldest son does not get anything at the time of splitting property (the property is in thier names). Is it even possible? If yes then if all possible proofs are given to prove that all the property has been bought by eldest son (the two other sons were studying when the property was bought... though the other two sons are educated and are working now and seems to understand the situation...but just want to know for my satisfaction). Thanks in advance.