Sahih Bukhari | Volume 3 | Hadith Number 708
Narrated by Abu Huraira
On my way to the Prophet I was reciting: 'What a long tedious tiresome night! Nevertheless, it has saved us From the land of Kufr (disbelief).' I had a slave who ran away from me on the way. When I went to the Prophet and gave the pledge of allegiance for embracing Islam, the slave showed up while I was still with the Prophet who remarked, "O Abu Huraira! Here is your slave!" I said, "I manumit him for Allah's Sake," and so I freed him.