I came to the Holy Prophet ﷺ when he was in Arafat. Some people or a group of people came from Najd. They commanded someone (to ask the Prophet about hajj). So he called the Messenger of Allah ﷺ, saying: How is the hajj done? He (the Prophet) ordered a man (to reply). He shouted loudly: The hajj, the hajj is on the day of Arafah. If anyone comes over there before the dawn prayer on the night of al-Muzdalifah, his hajj will be complete. The period of halting at Mina is three days. Then whoever hastens (his departure) by two days, it is no sin for him, and whoever delays it there is no sin for him. The narrator said: He (the Prophet) then put a man behind him on the camel. He began to proclaim this loudly. Abu Dawud said: This tradition has been narrated by Mahran from Sufyan in a similar way. This version adds: The Hajj, the Hajj, twice. The version narrated by Yaya b. Sa'id al-Qattan has the words: The Hajj only once. (Using translation from Abū Dāʾūd 1949)
أَتَيْتُ رَسُولَ اللهِ ﷺ وَهُوَ بِعَرَفَاتٍ فَأَتَاهُ نَفَرٌ مِنْ أَصْحَابِهِ فَأَمَرُوا رَجُلًا فَنَادَى يَا رَسُولَ اللهِ كَيْفَ الْحَجُّ كَيْفَ الْحَجُّ؟ قَالَ فَأَمَرَ رَجُلًا فَنَادَى الْحَجُّ يَوْمُ عَرَفَةَ مَنْ جَاءَ قَبْلَ صَلَاةِ الصُّبْحِ مِنْ لَيْلَةِ جَمْعٍ فَقَدْ تَمَّ حَجُّهُ أَيَّامُ مِنًى ثَلَاثَةٌ مَنْ تَعَجَّلَ فِي يَوْمَيْنِ فَلَا إِثْمَ عَلَيْهِ ثُمَّ أَرْدَفَ رَجُلًا مِنْ خَلْفِهِ فَنَادَى بِذَلِكَ