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Request: Sura 33 Aya 50 to 50
As explained in the commentary of verses 28 to 32 of this surah the Holy Prophet as a young man married Khadijah Kubra, a woman older than him, and she remained his only wife till her death. She gave birth to Fatimah Zahra through whom he was blessed with his progeny (see commentary of surah al Kawthar). It clearly indicates that he was not at all a sensuous male. The reason for his marriages, after the death of Khadijah Kubra has also been stated in the commentary of abovesaid verses.
Amir Ali in Spirit of Islam says (on the authority of many Muslim historians like Tabari etcetera) that after the death of Khadijah Kubra with a view to cement his friendship Abu Bakr made an offer of his daughter A-isha to the Holy Prophet. At his persuasive solicitations the Holy Prophet consented. This was an act of Abu Bakr's characteristic foresight. With the example of Abu Bakr before him, Umar, also desirous of having a like influence in the close circle of the Holy Prophet, gave his daughter to him. Hafsa was a widow. Umar first offered her to Abu Bakr and then to Uthman but the offer was rejected by both, Umar mentioned this to the Holy Prophet, as a complaint, who, out of compassion, accepted her as his wife.
Similarly, he married other women mentioned in the commentary of verses 28 to 32, either out of compassion, or on account of clemency, or to help his mission. All the books of history are clear on this point.
For polygamy see commentary of Nisa: 3.