I witnessed the Messenger of Allah ﷺ standing at Arafah when some people from Najd came to him and asked, "Messenger of Allah, how is the Hajj performed?"He replied, "Hajj is Arafah. Whoever arrives before the dawn prayer on the night of Jam has completed his Hajj. The days of Mina are three days. 'Whoever hastens to leave in two days, there is no sin upon him, and whoever delays, there is no sin upon him' [Baqarah 2:203]."Then he had a man ride behind him and instructed him to call out these words.
شهدت رسول الله ﷺ وهو واقف بعرفة، وأتاه ناس من أهل نجد، فقالوا: يا رسول الله: كيف الحج؟ فقال: الحج عرفة، فمن جاء قبل صلاة الفجر من ليلة جمع فقد تم حجه، أيام منى ثلاثة أيام، {فمن تعجل في يومين فلا إثم عليه ومن تأخر فلا إثم عليه} ثم أردف رجلا خلفه، فجعل ينادي بهن.
Abu Dawud (1949), Tirmidhi (889), and Ahmad (18774) narrated it, and Ibn Hibban (3892) and Hakim (1/463–464) graded it sahih, all of them through the route of Sufyan Thawri, from Bukayr bin Ataa, from Abdul-Rahman bin Yamar, and he related it. Its chain of transmission is sahih.Tirmidhi also narrated it from Ibn Abu Umar, who said, Sufyan bin Uyayna narrated to us, from Sufyan Thawri, from Bukayr bin Ataa, from Abdul-Rahman bin Yamar, from the Prophet ﷺ, similarly in meaning.Ibn Abu Umar said, Sufyan bin Uyayna said, "This is the best hadith narrated by Sufyan Thawri." He also said, Shubah narrated from Bukayr bin Ataa something similar to the hadith of Thawri. He said, I heard Jarud say, I heard Wakee mention this hadith and say, "This hadith is the mother of the rites of Hajj." End.