Bukhari (80:753) - "The Prophet said, 'The freed slave belongs to the people who have freed him.'"
Bukhari (52:255) - The slave who accepts Islam and continues serving his Muslim master will receive a double reward in heaven.
Bukhari (41.598) - Slaves are property. They cannot be freed if an owner has outstanding debt, but can be used to pay off the debt.
Bukhari (62:137) - An account of women taken as slaves in battle by Muhammad's men after their husbands and fathers were killed. The woman were raped with Muhammad's approval.
Bukhari (34:432) - Another account of females taken captive and raped with Muhammad's approval. In this case it is evident that the Muslims intend on selling the women after raping them because they are concerned about devaluing their price by impregnating them. Muhammad is asked about coitus interruptus.
Bukhari (47.765) - A woman is rebuked by Muhammad for freeing a slave girl. The prophet tells her that she would have gotten a greater heavenly reward by giving her to a relative (as a slave).
Bukhari (34:351) - Muhammad sells a slave for money. He was thus a slave trader.
Bukhari (72:734) - Some contemporary Muslims in the West, where slavery is believed to be a horrible crime, are reluctant to believe that Muhammad owned slaves. This is just one of many places in the Hadith where a reference is made to a human being owned by Muhammad. In this case, the slave is of African descent.
Muslim 3901 - Muhammad trades away two black slaves for one Muslim slave.
Muslim 4112 - A man freed six slaves on the event of his death, but Muhammad reversed the emancipation and kept four in slavery to himself. He cast lots to determine which two to free.
Bukhari (47:743) - Muhammad's own pulpit - from which he preached Islam - was built with slave labor on his command.
Bukhari (59:637) - "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.'" Muhammad approved of his men having sex with slaves, as this episode involving his son-in-law, Ali, clearly proves. This hadith refutes the modern apologists who pretend that slaves were really "wives," since Muhammad had forbidden Ali from marrying another woman as long as Fatima (his favorite daughter) was living.
Abu Dawud (2150) - "The Apostle of Allah (may peace be upon him) sent a military expedition to Awtas on the occasion of the battle of Hunain. They met their enemy and fought with them. They defeated them and took them captives. Some of the Companions of the Apostle of Allah (may peace be upon him) were reluctant to have intercourse with the female captives in the presence of their husbands who were unbelievers. So Allah, the Exalted, sent down the Qur’anic verse: (Qur'an 4:24) 'And all married women (are forbidden) unto you save those (captives) whom your right hands possess.'" This is the background for verse 4:24 of the Qur'an. Not only does Allah grant permission for women to be captured and raped, but allows it to even be done in front of their husbands. (See also Muslim 3432)
Abu Dawud 1814 - "...[Abu Bakr] He then began to beat [his slave] him while the Apostle of Allah (pbuh) was smiling and saying: Look at this man who is in the sacred state (putting on ihram), what is he doing?" The future first caliph of Islam is beating his slave for losing a camel while Muhammad looks on in apparent amusement.
Ibn Ishaq (734) - A slave girl is given a "violent beating" by Ali in the presence of Muhammad, who does nothing about it.
Ibn Ishaq (693) - "Then the apostle sent Sa-d b. Zayd al-Ansari, brother of Abdu'l-Ashal with some of the captive women of Banu Qurayza to Najd and he sold them for horses and weapons." Muhammad trades away women captured from the Banu Qurayza tribe to non-Muslim slave traders for property. (Their men had been executed after surrendering peacefully without a fight).