Sahih al-Bukhari 6656
Sahih al-Bukhari · Book 83: Oaths and Vows · "They swear by Allah their strongest oaths that ..."
Narrated Abu Huraira:
حَدَّثَنَا إِسْمَاعِيلُ ، قَالَ حَدَّثَنِي مَالِكٌ ، عَنِ ابْنِ شِهَابٍ ، عَنِ ابْنِ الْمُسَيَّبِ ، عَنْ أَبِي هُرَيْرَةَ ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ يَمُوتُ لأَحَدٍ مِنَ الْمُسْلِمِينَ ثَلاَثَةٌ مِنَ الْوَلَدِ، تَمَسُّهُ النَّارُ، إِلاَّ تَحِلَّةَ الْقَسَمِ " .
Allah's Messenger (ﷺ) said, "Any Muslim who has lost three of his children will not be touched by the Fire except that which will render Allah's oath fulfilled."