Is it considered an act of disobedience for a son to refrain from giving his father more money from his inheritance, after having already given him sums while he (the son) was in need of them to complete the building of his house and pay off his debts, given that the father is well-off, owns properties, and prefers his other siblings in giving?

The majority of scholars prevent a father from taking from his son's money except when there is a need. The Hanbalis concurred with this, stipulating that he should not inflict hardship or harm upon the son, and that he should not take to give to another son. Based on this, you are not obliged to give your father from your money as long as he is not in need, especially if you would be harmed by it or if he would give the money to another son.

Ibn Uthaymin advised fathers and mothers to fear Allah in raising their children with gentleness and sound guidance, and to avoid violence that leads to estrangement. As for children, he advised them to be patient, seek reward from Allah, and supplicate, emphasizing that obedience to parents is not obligatory in matters that cause hardship or harm to the children, or that do not benefit the parents.