Arabic hadith text
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَقُولُ مَنْ لَمْ يَقِفْ بِعَرَفَةَ مِنْ لَيْلَةِ الْمُزْدَلِفَةِ قَبْلَ أَنْ يَطْلُعَ الْفَجْرُ فَقَدْ فَاتَهُ الْحَجُّ وَمَنْ وَقَفَ بِعَرَفَةَ مِنْ لَيْلَةِ الْمُزْدَلِفَةِ مِنْ قَبْلِ أَنْ يَطْلُعَ الْفَجْرُ فَقَدْ أَدْرَكَ الْحَجَّ ‏.‏
Translation

Yahya related to me from Malik from Nafi that Abdullah ibn Umarused to say, "Someone who does not stand at Arafa on the night ofMuzdalifa before the dawn breaks has missed the hajj, and someone whostands at Arafa on the night of Muzdalifa before the dawn breaks hascaught the hajj."