"And if you fear that you cannot act equitably towards orphans, then marry such women as seem good to you, two and three and four; but if you fear that you will not do justice (between them), then (marry) only one or what your right hands possess; this is more proper, that you may not deviate from the right course." - Quran 4:3 (read more)

"Narrated by Gaber bin Abdullah: We were with the messenger of Allah, PBUH and he asked for a drink. One of his men said: "Oh Messenger of Allah, Can we offer you wine to drink?" He said Yes. He (Gaber) went out looking for the drink and came back with a cup of wine. The messenger (PBUH) asked:”Have you fermented it, even with one piece of ferment?” He (Gaber) said "yes" and he (Muhammad) drank." - Sahih Muslim 3753 (read more)

"Mohammed had many male and female slaves. He used to buy and sell them, but he purchased more slaves than he sold, especially after God empowered him by His message, as well as after his immigration from Mecca. He once sold one black slave for two. His name was Jacob al-Mudbir. His purchases of slaves were more than he sold. He was used to renting out and hiring many slaves, but he hired more slaves than he rented out." - Ibn Qayyim al-Jawziyya