Amr bin 'Uthman عمرو بن عثمان بن عفان · Chapters on Hajj Rituals

It was narrated from Ibn ‘Abbas that the Prophet (ﷺ) marked the sacrificial animal on the right side of the hump and wiped away the blood.

It was narrated from ‘Aishah that the Prophet (ﷺ) garlanded, and marked, and sent (the sacrificial animals), but he did not avoid anything that the one in Ihram avoids.