It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he heard the Prophet (peace and blessings be upon him) say: "Whoever from my Ummah has sent ahead two young children as a treasure, he will enter Paradise." Sayyidah Aisha Siddiqa (may Allah be pleased with her) submitted: "May my father be sacrificed for you, tell me, what is the ruling if someone has lost only one child?" He replied: "O woman who has been granted success! The same ruling applies to her." She asked again: "O Messenger of Allah (peace and blessings be upon him)! What if someone from your Ummah has no treasure at all?" He replied: "Then I will be the treasure for my Ummah, and they will not find anyone like me."
Hadith Referenceمسند احمد / ومن مسند بني هاشم / 3098