All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
These two sons do not have the right to dispose of their mother’s land for their personal benefit, whether by sale or otherwise, because the land is her own property and not theirs. The fact that she is a non-Muslim or mentally ill does not, on its own, entitle them to take her land or assume ownership of it and dispose of it. An insane person is not denied ownership of his property merely because of his insanity, and likewise, a non-Muslim is not denied ownership of his property merely because of his disbelief. Also, the fact that they do not inherit from her if she dies does not allow them to seize her wealth in her life. They also have no legal guardianship over their mother’s wealth because the guardianship over wealth is exclusively assigned to the father and grandfather from among the relatives. The author of Asna Al-Mataalib said: “Legal guardianship over wealth is not affirmed except to the father and grandfather.” [End of quote] If their mother were a Muslim, they would have no right to dispose of her wealth for their personal benefit, and since she is a non-Muslim, they have no right to dispose of her wealth with greater reason. In brief, it is impermissible for them to take that land.
Allah Knows best.