Sunan Abi Dawud — The Rites of Hajj (Kitab Al-Manasik Wa'l-Hajj) — Hadith No: 1762
Translation
Narrated Najiyah al-Aslami: The Messenger of Allah (ﷺ) sent sacrificial camels with him (as offering to the Ka'bah). He then said: If any one of them becomes fatigued, slaughter it, dip its shoes in its blood, and leave it for the people (to eat)