Ref. No 918 Alif
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
The interest money you received from the bank is Haram and you have to get rid of it by giving it to poor and needy persons as charity. The charity should be made without the intention of reward. The interest received from the bank is haram for those who are wealthy as per shariah (Sahibe Nisab), but for those who are poor and needy, the interest is not Haram but it is Halal. Since the interest money is not lawful for us so we cannot like it for ourselves. But when it is Halal for others then we like it for them. Similarly we give the zakat of our wealth to widows, poor and needy who are eligible for zakat because it is halal for them and we cannot hold the zakat amount with us because it is haram for us.
And Allah Knows Best
Darul Ifta
Darul Uloom Waqf Deoband