The Book of Pilgrimage
15/47. Chapter:
Departing from 'Arafat to Al-Muzdalifah. It is recommended to pray Maghrib and 'Isha together in Al-Muzdalifah on this night
Sahih Muslim
حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، أَخْبَرَنَا عَبْدُ الْمَلِكِ بْنُ أَبِي سُلَيْمَانَ، عَنْ عَطَاءٍ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَفَاضَ مِنْ عَرَفَةَ وَأُسَامَةُ رِدْفُهُ قَالَ أُسَامَةُ فَمَازَالَ يَسِيرُ عَلَى هَيْئَتِهِ حَتَّى أَتَى جَمْعًا .
Ibn Abbas (Allah be pleased with him) reported that Allah's Messenger (may peace be upon, him) came back from 'Arafa and Usama (Allah be pleased with him) was seated behind him. Usama said that he (the Holy Prophet) continued the journey in this very state until he came to Muzdalifa.
Reference : Sahih Muslim 1286aIn-book reference : Book 15, Hadith 310USC-MSA web (English) reference : Book 7, Hadith 2947