I've been seeking for answer and asking some advice related to this problem, but I haven't found the answer yet. In my country, we are superstitious about the belief that if our biological mother is angry and talk something bad to their children i.e. cursing, the curse would turn out to be real.
I have this friend of mine and I want to help him to convince that curse is not real. He used to be a bad person, he said it himself, and when he was 14, he realised that Islam is the only religion he could devote to. He does his prayer 5 times a day without absence, He started to memorize Quran. And what it does matter is, he is always unlucky. He blames himself that once his mother ever cursed him and I don't want him to think that there's no hope anymore. I'm afraid if he wouldn't trust Islam anymore, because he's been very religious from what I could see.
What should he do? Is there any advice to help him? Quran or Hadith recitation related to this topic would be appreciated.