Muhammad
Muhammad's life is traditionally defined into two periods: pre-hijra (emigration) in Mecca (from 570 to 622), and post-hijra in Medina (from 622 until 632). Muhammad is said to have had thirteen wives in total (although two have ambiguous accounts, Rayhana bint Zayd and Maria al-Qibtiyya, as wife or concubine.) Eleven of the thirteen marriages occurred after the migration to Medina.
Muhammad's wives
At the age of 25, Muhammad wed his wealthy employer, the 40-year-old merchant Khadija. In another narration, it is reported that she was only 28 years old, given that she had four children with Muhammad after their marriage. This marriage, his first, would be both happy and monogamous; Muhammad would rely on Khadija in many ways, until her death 25 years later. They had two sons, Qasim and Abd-Allah (nicknamed "al-Ṭāhir" and "al-Ṭayyib" respectively), both died young, and four daughters—Zaynab, Ruqaiya, Umm Kulthum and Fatimah. Shia scholars dispute the paternity of Khadija's daughters, as they view the first three of them as the daughters from previous marriages and only Fatimah as the daughter of Muhammad and Khadija. During their marriage, Khadija purchased the slave Zayd ibn Harithah, then adopted the young man as her son at Muhammad's request. According to Shia scholars Khadija was a virgin when she married Muhammad and she was not a widow. Abu Talib and Khadija passed away in the same year after living in Shaeb e Abi Talib with Muhammad. He declared the year as Aam ul Huzn (year of sorrow).