Ja'far bin Muhammad narrates from his father that the Prophet (peace and blessings be upon him) said about the aqiqah that Sayyidah Fatimah (may Allah be pleased with her) performed on behalf of Hasan and Husayn (may Allah be pleased with them both): "Send one leg of it to the midwife, eat and feed others, and do not break any of its bones."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19286