ANSWER: Dealing with riba in any form for any reason is prohibited. You must not help him in obtaining a riba based loan. You can weigh the gold and give it to him as a loan so that he can return it in the same carat and weight later on.

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ANSWER: What you have heard is not correct.  You can take loan without interest, which means at the time of paying back you only pay what you had taken and not a penny more.  What is totally prohibited is to take an interest based loan. 

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