Ja'far bin Abi Thawr narrates from Sayyiduna Jabir bin Samurah (may Allah be pleased with him) that he said: "The Messenger of Allah (peace and blessings be upon him) ordered us to perform ablution after eating camel meat, and not to perform ablution after eating goat meat, and to pray in the pens of sheep and goats, and not to pray in the pens of camels."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1851