Some people among the residents of Najd came to the Messenger of Allah while he was at Arafat. They were questioning him, so he ordered a caller to proclaim: "The Hajj is Arafah. Whoever came to Jam during the night, before the time of Fajr, then he has attended the Hajj. The days of Mina are three, so whoever hastens (leaving after) two days, then there is no sin upon him, and whoever delays, then there is no sin upon him." Muhammad said: "Yahya added: 'And he took a companion rider to proclaim it.'"
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، وَعَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، قَالاَ حَدَّثَنَا سُفْيَانُ، عَنْ بُكَيْرِ بْنِ عَطَاءٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ يَعْمَرَ، أَنَّ نَاسًا، مِنْ أَهْلِ نَجْدٍ أَتَوْا رَسُولَ اللَّهِ صلى الله عليه وسلم وَهُوَ بِعَرَفَةَ فَسَأَلُوهُ فَأَمَرَ مُنَادِيًا فَنَادَى الْحَجُّ عَرَفَةُ مَنْ جَاءَ لَيْلَةَ جَمْعٍ قَبْلَ طُلُوعِ الْفَجْرِ فَقَدْ أَدْرَكَ الْحَجَّ أَيَّامُ مِنًى ثَلاَثَةٌ فَمَنْ تَعَجَّلَ فِي يَوْمَيْنِ فَلاَ إِثْمَ عَلَيْهِ وَمَنْ تَأَخَّرَ فَلاَ إِثْمَ عَلَيْهِ . قَالَ مُحَمَّدٌ وَزَادَ يَحْيَى وَأَرْدَفَ رَجُلاً فَنَادَى.
Tirmizi
The Book on Hajj • Hadith 889