Any Muslim who loses (to death) three children before reaching puberty will be admitted by Allah into Paradise because of his being merciful to them. [Al-Bukhari]

"«ما مِنْ مُسْلِم يموت له ثلاثة لم يَبْلُغوا الحِنْثَ إلا أدْخَلَه الله الجنَّة بِفَضْل رَحْمَتِهِ إيَّاهُمْ». [صحيح.] - [رواه البخاري.]"