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.  

أَتَيْتُ النَّبِيَّ ﷺ وَهُوَ بِعَرَفَةَ فَجَاءَ نَاسٌ أَوْ نَفَرٌ مِنْ أَهْلِ نَجْدٍ فَأَمَرُوا رَجُلاً فَنَادَى رَسُولَ اللَّهِ ﷺ كَيْفَ الْحَجُّ فَأَمَرَ رَسُولُ اللَّهِ ﷺ رَجُلاً فَنَادَى الْحَجُّ الْحَجُّ يَوْمُ عَرَفَةَ مَنْ جَاءَ قَبْلَ صَلاَةِ الصُّبْحِ مِنْ لَيْلَةِ جَمْعٍ فَتَمَّ حَجُّهُ أَيَّامُ مِنًى ثَلاَثَةٌ فَمَنْ تَعَجَّلَ فِي يَوْمَيْنِ فَلاَ إِثْمَ عَلَيْهِ وَمَنْ تَأَخَّرَ فَلاَ إِثْمَ عَلَيْهِ قَالَ ثُمَّ أَرْدَفَ رَجُلاً خَلْفَهُ فَجَعَلَ يُنَادِي بِذَلِكَ  

I came to the Messenger of Allah ﷺ at the place of halting, that is, al-Muzdalifah. I said: I have come from the mountains of Tayy. I fatigued my mount and fatigued myself. By Allah, I found no hill (on my way) but I halted there. Have I completed my hajj? The Messenger of Allah ﷺ said: Anyone who offers this prayer along with us and comes over to Arafat before it by night or day will complete his hajj and he may wash away the dirt (of his body).  

أَتَيْتُ رَسُولَ اللَّهِ ﷺ بِالْمَوْقِفِ يَعْنِي بِجَمْعٍ قُلْتُ جِئْتُ يَا رَسُولَ اللَّهِ مِنْ جَبَلِ طَيِّئٍ أَكْلَلْتُ مَطِيَّتِي وَأَتْعَبْتُ نَفْسِي وَاللَّهِ مَا تَرَكْتُ مِنْ جَبَلٍ إِلاَّ وَقَفْتُ عَلَيْهِ فَهَلْ لِي مِنْ حَجٍّ فَقَالَ رَسُولُ اللَّهِ ﷺ مَنْ أَدْرَكَ مَعَنَا هَذِهِ الصَّلاَةَ وَأَتَى عَرَفَاتٍ قَبْلَ ذَلِكَ لَيْلاً أَوْ نَهَارًا فَقَدْ تَمَّ حَجُّهُ وَقَضَى تَفَثَهُ