Sunan Abu Dawud
1225
Hasan+3

Narrated Anas ibn Malik: When the Messenger of Allah (ﷺ) was on a journey and wished to say voluntary prayer, he made his she-camel face the qiblah and uttered the takbir (Allah is most great), then prayed in whatever direction his mount made his face

HasanAl-Albani
HasanMuhammad Muhyi Al-Din Abdul Hamid