It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: "Any Muslim whose three minor children have died, it is not possible that he will enter Hell except to fulfill an oath (he will not remain in Hell forever)."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10210
Hadith Gradingحکم دارالسلام:حديث صحيح، خ: 1251، م: 2632، وهذا إسناد ضعيف لضعف زمعة، وقد توبع