Is it permissible for a father to take a portion of his son's money to marry off his siblings, knowing that the son needs this money to secure the future of his children?

It is not permissible for a father to take from his son's wealth to give to his other children (the son's siblings) or to marry them off with it. If he does so, this is not an act of kindness. The son should not anger his father or scold him. If the father insists on carrying out his wish, the son is permitted to refuse to give him the money, and this is not considered an act of disobedience (uqooq); because obedience is only in what is good (maroof). However, the son's patience in the face of his father's transgression against his right, and letting him do what he wants, is better for him; because honoring one's parents is a cause for entering Paradise.