What should I do with the usurious interest I received from the bank and savings account, and is it permissible to give it to my brother who is in debt to me?

A Muslim must withdraw their funds from usurious institutions and invest them in permissible (halal) ventures. Usurious gains (interest) should be disposed of by spending them on the poor and needy, or on charitable projects, with the intention of ridding oneself of illicit gains, not as charity. These funds can be given to a poor or needy brother to fulfill his needs, not to pay off a debt he owes you. However, once he receives the money, he may dispose of it as he wishes, and there is no harm if he uses it to pay off his debt to you, provided there was no prior collusion.