How is the mother's inheritance distributed among her son and her three daughters?

If a woman dies leaving behind only one son and three daughters, and has no other heirs (such as a father, mother, husband, paternal grandfather, or maternal grandmother), then her inheritance is divided among her children by way of ta’sib (residuary heirship), with the male receiving the share of two females, in accordance with the Almighty's saying: "Allah instructs you concerning your children: for the male, what is equal to the share of two females."

In this case, the inheritance is divided into five shares: two shares for the son, and one share for each daughter.

It is advisable to refer inheritance matters to Sharia courts or consult with scholars specializing in them to ascertain all heirs, debts, and bequests, as these take precedence over the rights of the heirs.