وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يُصَلِّي وَرَاءَ الإِمَامِ بِمِنًى أَرْبَعًا فَإِذَا صَلَّى لِنَفْسِهِ صَلَّى رَكْعَتَيْنِ ‏.‏

Yahya related to me from Malik from Nafi that Abdullah ibn Umarused to pray four rakas behind the imam at Mina, and when he prayed byhimself he would pray two rakas. Translation Not Available

Book Ref: Muwatta Imam Malik Book 9 Hadith 351
Web Ref:  Muwatta Imam Malik Book 9 Hadith 22