ANSWER:

It is totally prohibited to take riba, in fact it’s a major sin. However the money he’s spending on his family is halal for them and the sin is totally on the father alone. 

sheikh my father is involved in in riba since very long , we brothers have tried our level best to explain him. He says he is not using te money in food but in unnecessary things like electric bills and and other housebhold bills… what should we do how to make him stop this .. what is the ruling for it and is it ok to spend this money like this .

Riba | February 28, 2018 6:50 am
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I borrow some amount from my sister now I Have to return that amount but I will not return all money at one time she know this thing and she didn’t have any problems. Can I use my interest money to remove my debt(karz) can my sister take that money
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My question is that can you give a commercial building of your own for rent to a bank ? Is it permissable ?because my father is a religious person and he is of the view that the principles or activities on which a Bank deal are prohibited in islam. So i need your guidence in this manner that would it be permissible to allow a bank to take your building as a rent or not ?