Sayyidah Habibah (may Allah be pleased with her) said that she was with Sayyidah Aishah (may Allah be pleased with her) when the Prophet (peace and blessings be upon him) came and entered upon her and said: "Any Muslim husband and wife who lose three children who have not yet reached puberty, those children will be brought on the Day of Resurrection until they are made to stand at the gate of Paradise. It will be said to them: 'Enter Paradise.' They will say: 'Not until our parents enter.' Then it will be said to them: 'Enter Paradise, you and your parents.'"
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20941