(80) بَابُ فَضْلِ مَنْ مَاتَ لَهُ الْوَلَدُ
Anas ibn Malik reported that the Prophet, may Allah bless him and granthim peace, said, "If someone has three children die before they reach puberty,Allah will admit him and them to the Garden by virtue of His mercy."
Reference: Al-Adab Al-Mufrad 151
In-book reference: Book 8, Hadith 9
English translation: Book 8, Hadith 151