Is there any sin on him if he takes out a loan for someone else and he does not pay it off?

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Check below answers in case you are looking for other related questions:
Listening to Others Backbiting
Internet cafes are a hotbed of evil

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Looking at children or pictures of children with desire
Ruling on smoking the argileh or shisha – and a discussion on its harmful effects
Her husband watches porn with the excuse of stress at work
Listening to Others Backbiting
Internet cafes are a hotbed of evil

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