What is the ruling on a father selling his sole plot of land to one of his sons for a symbolic sum to facilitate its investment by changing the ownership documents?

A father must be equitable among his children in giving gifts, based on the Prophet's (PBUH) saying: "Fear Allah and be just among your children." Preferential treatment is permissible for a legitimate reason, such as a need, illness, preoccupation with seeking knowledge, or withholding a gift from one who would use it for disobedience. What was mentioned about registering the house as a sale and purchase to the eldest son for a symbolic price is considered favoritism, which is not permissible except with a legitimate justification. The father must either grant a similar gift to the rest of his children or reclaim the gift.