Muwatta Malik, Book 16, Hadith 561 (In-Book) ⓘ

Yahya related to me from Malik from Muhammad ibn Abi Bakr ibn Amr ibn Hazm from his father from Abu'n-Nadr as-Salami that the Messenger of Allah, may Allah bless him and grant him peace, said, "If three of a muslim's children die, and he remains content with that, they will be a protection for him from the Fire." A woman who was with the Messenger of Allah, may Allah bless him and grant him peace, said, "Or two, Messengerof Allah?", and he said, "Or two."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ مُحَمَّدِ بْنِ أَبِي بَكْرِ بْنِ عَمْرِو بْنِ حَزْمٍ، عَنْ أَبِيهِ، عَنْ أَبِي النَّضْرِ السَّلَمِيِّ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ لاَ يَمُوتُ لأَحَدٍ مِنَ الْمُسْلِمِينَ ثَلاَثَةٌ مِنَ الْوَلَدِ فَيَحْتَسِبُهُمْ إِلاَّ كَانُوا جُنَّةً مِنَ النَّارِ ‏"‏ ‏.‏ فَقَالَتِ امْرَأَةٌ عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم يَا رَسُولَ اللَّهِ أَوِ اثْنَانِ قَالَ ‏"‏ أَوِ اثْنَانِ ‏"‏ ‏.‏