Amr bin Shu'ayb narrates from his father, and he from his grandfather (Sayyiduna Abdullah bin Amr bin al-As, may Allah be pleased with them both), that the Messenger of Allah (peace and blessings be upon him) was asked about the aqiqah and the fara', and he (peace and blessings be upon him) said: "The fara' is a right. Leave it until it becomes a full-grown camel, then give it to widows, or let it be given as a mount in the path of Allah. This is better than slaughtering it while its flesh is still stuck to its hair, and you overturn your vessel and leave your she-camel bereaved."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19341