Muwatta Malik:Hajj:Hadith 885
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَقُولُ الْهَدْىُ مَا قُلِّدَ وَأُشْعِرَ وَوُقِفَ بِهِ بِعَرَفَةَ ‏.‏

Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to say, “A sacrificial animal is what has been garlanded, branded, and stood with on Arafa.”