Ruling on the expenses of one whose father’s wealth comes from gambling?

Question:
A person says that his father always brings money from gambling?

Answer:
He should advise him and explain to him that it is forbidden, and that it is gambling.
Q: He asks about the expenses: food and drink?
A: He should not eat from it if he knows that it is from gambling.
Q: Knowing that they have nothing else?
A: Even so, he should ask people if he is in dire necessity, and he should not eat what is forbidden.