Revelations of Convenience
According to revelations Muhammad claimed to receive, a Muslim was "entitled" to four wives at a time, and no more. Except Muhammad, of course, who had special dispensation from Allah to have as many as thirteen.
To prevent jealousy (in his harem) he spent one night with each of them in turn. One day it was his wife Hafsa's turn. She was away visiting her father but then returned unexpectedly. She was furious to find the Prophet in bed with Mary, the Coptic maid and concubine. Hafsa reproached him bitterly, threatening to tell the other wives. Muhammad promised to stay away from the hated Mary if she would keep quiet. Hafsa, however, confided in Aisha, who also hated Mary. [Vishal Mangalwadi, The Book That Made Your World: How the Bible Created the Soul of Western Civilization (Nashville, TN: Thomas Nelson, 2011), p. 282.]The scandal spread through the whole harem and Muhammad found himself ostracized. But not to worry.