Ja'far bin Abi Thawr narrates from his grandfather, Sayyiduna Jabir bin Samurah (may Allah be pleased with him), that a man said: O Messenger of Allah, should I perform ablution after eating the meat of sheep? He said: "If you wish, do so, and if you wish, do not." He said: Should I perform ablution after eating the meat of camels? He said: "Yes." He said: O Messenger of Allah, may I pray in the places where sheep spend the night? He said: "Yes." He said: May I pray in the places where camels spend the night? He said: "No."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1847