The marriage of the Holy Prophet (Allah's prayers be upon him and upon his holy Household) and Lady Khadija bint Khowaylid (peace be upon her) which anniversary is today, is a blessed and important event in the Islamic history. She (peace be upon her) has a great role in the life of the Holy Prophet (Allah's prayers be upon him and upon his holy Household) before and after the Bi'thah, as this marriage was in favor of the Islamic message.
The great saint Khadija bint Khuwaylid (peace be upon her), who is the best, the most respectable, the most beloved and the most virtuous of the wives of the Prophet (prayers and Allah's peace be upon him and his holy household). She was a resolute honorable lady from the most important noble families of Quraych and the wealthiest. She championed her husband the Messenger of Allah (prayers and Allah's peace be upon him and his holy Household) during the ordeal days, she lightened his sorrows when he (prayers and Allah's peace be upon him and his holy Household) was faced by hatred from the infidels of Mecca, and she remained supporting him up to the last moment of her life. It is narrated by Anas Ibn Malek that the Messenger of Allah (prayers and Allah's peace be upon him and his holy household) has said: "The best of all mankind's women are four: Maryam bint `Imran (Mary mother of Jesus), Assiya daughter of Muzahim, wife of Pharaoh, Khadija bint Khuwaylid and Fatima Az-Zahra daughter of Mohammad (prayers and Allah's peace be upon him and his holy household,)" and that the first women believed in the religion of Islam was Khadija (peace be upon her).
Our saint Prophet (prayers and Allah's peace be upon him and his holy household) said about her (peace be upon her): "Islam did not rise except through Ali's sword and Khadija's wealth," because she spent all her money for the sake of the victory of Islam, and Muslims will remain always and forever owe to the sacrifices of this pure woman who formed with the Jihad of imam Ali Ibnu Abi Talib (peace be upon them) the most important powerful axes and thoughtful bases to spread the religion of Islam and make its flag flapping high up to this day.
Saint Khadija (peace be upon her) was to the Messenger (prayers and Allah's peace be upon him and his holy household) a haven of tranquillity and peace, when he was hurt from the evils of the polytheists and aristocrats of Quraysh, she was his serenity, his comfort, his love and his compassion, she had always the wise opinion, in deed, she is the perfect example of the pious and virtuous woman. With the exception of Khadija (peace be upon her), the Apostle (prayers and Allah's peace be upon him and his holy household) married all other women for one or more of reasons. His marriage with Khadija was the only one which rested upon affection, love and friendship; and for him, it fulfilled all the aims of marriage. Our holy prophet (prayers and Allah's peace be upon him and his holy household) has said: "I have never been distressed during the life of Abu Taleb and Khadija."
Saint Khadija (peace be upon her) was the favourite slave of Allah, she was unique; she was incomparable, and she was a "special" in the sight of Allah Who sent His greetings and salutations to her through the Archangel Gabriel. As the Lord of Dignity ordered Gabriel (peace be upon him) to convey His regards to her. Gabriel (peace be upon him) said to Mohammad (prayers and Allah's peace be upon him and his holy household): "O Mohammad! Khadija is bringing you a bowl of food; when she comes to you, tell her that her Lord greets her, and convey my greeting, too, to her." When he (prayers and Allah's peace be upon him and his holy household) did so, she said: "Allah is the Peace, and He is the source of all peace, and upon Gabriel be peace."
She (peace be upon her) got married to the Holy Prophet (prayers and Allah's peace be upon him and his holy Household) in the tenth of Rabi' al-Awwal, and he did not marry any other wife in her life until she died (Peace be upon her).
When Ali (peace be upon him) was at the custody of the Prophet Muhammad (Allah's prayers be upon him) and lived under his auspices. Lady Khadijah bint Khuwaylid; the wife of the Holy Prophet (Allah's prayers be upon him and his holy Household) was like a mother for Ali (peace be upon both of them).