I work with my cousin
in a commercial project. I agreed to help him, for he is indebted and has to settle his debt. However, my cousin drinks wine and intoxicants; what is the ruling on my work with him? It is worth mentioning that I could reduce the amount of wine that he drinks.
If your work in the commercial project does not contain any unlawful matters, it is permissible for you to continue and you should advise your cousin to abandon intoxicants. (Part No. 14; Page No. 419) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.