Abu Huraira (may Allah be pleased with him) narrates: "Sometimes the month is of twenty-nine days, so do not begin fasting until you see the crescent, and do not stop fasting until you see it, and if it is cloudy, then complete the count to thirty. Your Eid al-Fitr will be on the day when all the people perform Eid al-Fitr, and Eid al-Adha will be on the day when all the people perform Eid al-Adha. The whole of Arafah is a place for standing (Wuquf), the whole of Mina is a place for sacrifice, and every street of Makkah is a place for sacrifice." Hammad bin Zaid narrated this report from Ayyub and transmitted it as a marfu' narration up to the Prophet Muhammad (peace be upon him).