What is the legally prescribed proportion for bearing the responsibility of compensating the grandmother for the stolen gold and money, knowing that the theft was carried out by her grandson with the help of his maternal cousin, and involved selling the gold and purchasing a replacement?

Theft is a grave sin, and its ugliness intensifies when committed against a relative, such as a grandmother. The children must return what was stolen to her. What the two thieves shared is equally their responsibility, and what one of them individually took is solely incumbent upon him, in accordance with the principle: "And no bearer of burdens will bear the burden of another."