It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) used to offer the sacrifice of two rams. Sayyiduna Anas (may Allah be pleased with him) said: (For this reason) I also offer the sacrifice of two rams.
Hadith Referenceالسنن المأثورة / باب من أعتق شركا له في عبد / 561