It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) used to perform (optional) prayers on his camel facing towards the east, and when he performed obligatory prayers, he would dismount from the animal and then face the Qiblah to pray.
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1552
Sayyiduna Amir bin Rabi’ah (may Allah be pleased with him) said that I saw the Messenger of Allah (peace and blessings be upon him) performing voluntary prayers on a she-camel, praying by gesturing with his head, without considering which direction the mount was facing, but in obligatory prayers, the Messenger of Allah (peace and blessings be upon him) did not do so.
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1553
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده ضعيف عبد الله بن صالح سيئ الحفظ جدا. ولكن الحديث متفق عليه، [مكتبه الشامله نمبر: 1555]
Hadith Takhrijاس روایت میں عبدالله بن صالح سئی الحفظ جدا ہیں لیکن حدیث دوسرے طرق سے بھی مروی اور صحیح متفق علیہ ہے۔ دیکھئے: [بخاري 1197] ، [مسلم 701] ، [أبويعلی 7202] ، [أبوداؤد 1224] ، [نسائي 489]