Please tell me the marriage between a sunni boy and a shia girl. Is it permissible or not. As far as I know the one believes in oneness of Allah and believes that Mohammad (SAW) is the last Prophet is a muslim. So how we can not marry to shia? I know there are some differences in performing the namaz and the time for iftar and sehri but will these differences consider anyone a kafir to whom we should not marry? Please give me any reference from Quran or hadith that the marriage between different sects is allow or haram?