Sahih Muslim , Book 7, Hadith 2956 (USC-MSA) ⓘ
A'bdullah (b. 'Umar) reported: I have never seen Allah's Messenger, but observing the prayers at their appointed times except two players, sunset and 'Isha, ' at Muzdalifa (where he deferred the sunset prayer to combine it with 'Isha' and he observed the dawn prayer before its stipulated time on that day (10th of Dhu'l-Hijja).
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، وَأَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ وَأَبُو كُرَيْبٍ جَمِيعًا عَنْ أَبِي مُعَاوِيَةَ، - قَالَ يَحْيَى أَخْبَرَنَا أَبُو مُعَاوِيَةَ، - عَنِ الأَعْمَشِ، عَنْ عُمَارَةَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ يَزِيدَ، عَنْ عَبْدِ اللَّهِ، قَالَ مَا رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم صَلَّى صَلاَةً إِلاَّ لِمِيقَاتِهَا إِلاَّ صَلاَتَيْنِ صَلاَةَ الْمَغْرِبِ وَالْعِشَاءِ بِجَمْعٍ وَصَلَّى الْفَجْرَ يَوْمَئِذٍ قَبْلَ مِيقَاتِهَا .
also referenced under: Book 15, Hadith 320 (In-Book) & Hadith 1289 (Reference)