عبد الرحمن الداخل
The harem could contain thousands of slave concubines; the harem of Abd al-Rahman I consisted of 6,300 women. They were appreciated for their light skin. The concubines (jawaris) were educated in accomplishments to please their master, and many became known and respected for their knowledge in a variety of subjects from music to medicine. A jawaris concubine who gave birth to a child attained the status of an "umm walad", which meant that they could no longer be sold and were to be set free after the death of her master.