Sahih Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Volume: 005 / Book Number: 059 / Hadith Number: 639
Narrated 'Ata:
Jabir said, "The Prophet ordered 'Ali to keep the state of Ihram." Jabir added, "Ali bin Abi Talib returned (from Yemen) when he was a governor (of Yemen). The Prophet said to him, 'With what intention have you assumed the state of Ihram?' 'Ali said, "I have assumed Ihram with an intention as that of the Prophet." Then the Prophet said (to him), 'Offer a Hadi and keep the state of Ihram in which you are now.' 'Ali slaughtered a Hadi on his behalf."