Assalamu alaykum, jazakum Allah khayrain for all your replies. Indeed, if this story is true (we have yet to find the hadith), it is a powerful reminder of the extent to which Islam can transform the believer, even if he committed the most abhorrent sins. It should remind us all of Allah's mercy and it is pure ignorance that it should be used to defame or slander Sayyidna Umar (radi Allahu anhu). wa salam