A man takes out riba (usury or interest) loans to spend on luxuries; should his sons help him repay them if he cannot?

Question:
He says: Honorable Shaykh, may Allah grant you success. A man borrows heavily from people, taking out explicit riba (usury or interest) loans. When the due date arrives, he asks his sons to pay it off, fearing imprisonment. He says, Honorable Shaykh, that he spends this money on luxuries. The question is: What is the ruling on giving this man from zakah (the obligatory alms) to pay off his riba (usury or interest) debt, and what is the position of his sons toward him?

Answer:
They should not help him in what is forbidden. Allah (Mighty and Majestic) says: regarding sin and transgression. Riba (usury or interest) is among the most severe forms of transgression, and may Allah protect us from the most severe sins. So they should not help him in that until he repents to Allah (Mighty and Majestic) and abandons this great sin. He said to them, "Let them imprison him." It is better for him to be imprisoned, perhaps he will repent to Allah and be deterred. Yes.