Hadith 904
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يُصَلِّي الْمَغْرِبَ وَالْعِشَاءَ بِالْمُزْدَلِفَةِ جَمِيعًا .
Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to pray maghrib and isha together at Muzdalifa
Mauquf Sahih (Salim al-Hilali)
Muwatta Malik 904 · Book 20, Hadith 200