Ja'far bin Abi Thawr narrates that Sayyiduna Jabir bin Samurah (may Allah be pleased with him) said: A man came to the Prophet (peace and blessings be upon him) while I was with him (peace and blessings be upon him), and said: O Messenger of Allah, should I perform ablution after eating the meat of sheep? He said: "If you wish, perform ablution, and if you wish, do not." He said: Then may I pray in the pens of sheep? He said: "Yes." He said: Then should I perform ablution after eating the meat of camels? He said: "Yes." He said: Then may I pray in the resting places of camels? He said: "No."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1846