Sahih Bukhari

Narrated Abu Huraira:When I came to the Prophet (ﷺ), I said on my way, ""O what a long tedious tiresome night; nevertheless, it has rescued me from the place of Heathenism."" A slave of mine ran away on the way. When I reached the Prophet (ﷺ) I gave him the oath of allegiance (for Islam), and while I was sitting with him, suddenly the slave appeared. The Prophet (ﷺ) said to me. ""O Abu Huraira! Here is your slave,"" I said, ""He (i.e. the slave) is (free) for Allah's Sake,"" and manumitted him