If a father treats his children unequally to the point that one of them develops a mental illness, does the father sin in that?

Question:
May Allah reward you with good, and may He do you good. If a father treats his children unequally, and one of them develops a mental illness, does the father sin in that? And if the son comes to hate his father because of this unequal treatment, does he also sin in that? May Allah reward you with good.

Answer:
The father must treat his children well because they are his sons, and he must be just between them in his treatment and giving. If he deals with them in a bad way, and as a result the son suffers from a mental or physical illness, then the father sins, because this is an act of aggression. Allah, Mighty and Majestic, has forbidden aggression and tyranny without right. So the father must treat his children well. Likewise, the children must treat their fathers, their parents, well. This is what is required. Yes.