When one sees reciting Surah Nasr in his dream, it means that he will pay for his sins and none of his child will live, for ALLAH says; He does not beget nor is he begotten. Some Ulama say that its recitation in the dream is an indication that the reader will be amuwahhid (ie monotheist). Moreover, he will have a son who will live so long that he will be the last amongst his family members to die. Source: Ibn Sirin