Sahih Bukhari Volume 5, Book 59, Hadith Number 637.

Narrated By Buraida : The Prophet sent ‘Ali to Khalid to bring the Khumus (of the booty) and I hated Ali, and ‘Ali had taken a bath (after a sexual act with a slave-girl from the Khumus). I said to Khalid, “Don’t you see this (i.e. Ali)?” When we reached the Prophet I mentioned that to him. He said, “O Buraida! Do you hate Ali?” I said, “Yes.” He said, “Do you hate him, for he deserves more than that from the Khumlus.”