Though I am a Muslim too, but not a blind supporter of Islam and I collect the history of the facts. The following are indeed the real facts that happened after 623 A. D.:
There are hundreds of Hadith that deal with slavery. Whole chapters of Hadith are dedicated to dealing with the taxation, treatment, sale, and jurisprudence of slaves. In addition to this, numerous Hadith mention slaves, and their relation to their Muslim masters. Here is a selection of Hadith on slaves: [all Hadith are from Sahih Bukhari, unless noted.]
Vol. 7-#137 Narrated Abu al-Khudri: "We got female captives in the war booty and we used to do coitus interruptus with them. So we asked Allah's messenger about it and he said, "Do you really do that?" repeating the question thrice, "There is no soul that is destined to exist but will come into existence, till the Day of Resurrection.""
Here, Muslims had taken female slaves, and had sex with them. Muhammad approved of this. He only admonished them not to practice coitus interruptus.
Vol. 5-#459 [This Hadith is similar to the above. However, additional details are added]. Narrated Ibn Muhairiz: "I entered the mosque and saw Abu Khudri and sat beside him and asked him about coitus interruptus. Abu said, "We went out with Allah's messenger for the Ghazwa (attack upon) Banu Mustaliq and we received captives from among the Arab captives and we desired women and celibacy became hard on us and we love
