Abbad bin Abi al-Darda' (may Allah have mercy on him) narrates from his father (Sayyiduna Abu al-Darda', may Allah be pleased with him) that two jadha'ah rams, black and white, were given as a gift to the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) sacrificed them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19078