Abu Murrah (may Allah have mercy on him), the freed slave of Amr bin Al-As (may Allah be pleased with him), narrates: He and Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) went to Amr bin Al-As (may Allah be pleased with him) two days after Eid al-Adha. Sayyiduna Amr (may Allah be pleased with him) presented food, so Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said, "I am fasting." Sayyiduna Amr (may Allah be pleased with him) said: "Break your fast, for in these days the Messenger of Allah (peace and blessings be upon him) commanded us to break the fast and forbade fasting on these days." Abu Murrah (may Allah have mercy on him) says that Sayyiduna Abdullah (may Allah be pleased with him) broke his fast, and both of them ate the food, and I ate with them.
Hadith Referenceالسنن المأثورة / باب ما جاء في تقدم الشهر / 341
Hadith Takhrijسنن ابی داؤد، الصوم، باب صيام ايام التشریق، رقم : 2418 وقال الالبانی: صحیح، مسند احمد : 302/29، رقم : 17768 وقال اسنادہ صحیح علی شرط الشيخین، السنن الکبری للبیہقی : 297/4 وصححہ ابن خزیمہ : 311/3، رقم : 2149، والحاکم : 435/1 و وافقہ الذہبی