Al-Qasim bin Muhammad and Amrah bint Abd al-Rahman narrated from Sayyidah Aishah (may Allah be pleased with her) that the sacrificial animal is only that which is garlanded, marked (ish'ar), and taken to stand at Arafah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10175