also it is not a sin if you divorce your wives before the consummation of the marriage or the fixing of the dowry. but the dowry will be due from a husband whether he is rich or poor. it is payable in a reasonable amount according to the husbands financial ability. this is an obligation for the righteous ones.
لا جناح عليكم إن طلقتم النساء ما لم تمسوهن أو تفرضوا لهن فريضة ومتعوهن على الموسع قدره وعلى المقتر قدره متاعا بالمعروف حقا على المحسنين