Umar bin Salim Al-Zurqi (may Allah have mercy on him) narrates from his mother, she says: We were in Mina when Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) was riding a camel and proclaiming: Indeed, the Messenger of Allah (peace and blessings be upon him) said: "These are days of eating and drinking; no one should fast during them." He was announcing this loudly while riding the camel behind the people.
Hadith Referenceالسنن المأثورة / باب ما جاء في تقدم الشهر / 340
Hadith Takhrijمسند احمد : 194/2، رقم : 824 وقال الارنوؤط اسنادہ صحیح