(19) بَابُ بِرِّ الْوَالِدَيْنِ بَعْدَ مَوْتِهِمَا
Abu Hurayra reported that the Messenger of Allah, may Allah bless himand grant him peace, said, "When a person dies, all action is cut off forhim with the exception of three things:
sadaqa which continues, knowledgewhich benefits, or a righteous child who makes supplication for him."
Reference: Al-Adab Al-Mufrad 38
In-book reference: Book 1, Hadith 38
English translation: Book 1, Hadith 38