Edward Gibbon During the 24-years of their marriage...
Edward Gibbon During the 24-years of their marriage, Khadija's youthful husband abstained from the right of polygamy, and the pride or tenderness of the venerable matron was never insulted by the society of a rival. After her death, the Prophet placed her in the rank of four perfect women, with the sister (sic) of Moses, the mother of Jesus, and Fatima, the best beloved of his daughters (sic).
(The Decline and Fall of the Roman Empire) Muhammad ibn Ishaq, the biographer of the Prophet, says that when there was resumption of Divine revelation, after its cessation following the first two visits of Gabriel, Khadija received a tribute and a salutation of peace from Allah Ta'ala.
The message was communicated to Muhammad by Gabriel, and when he conveyed it to Khadija, she said: "Allah is Peace (as-Salam), and from Him is all Peace, and may peace be on Gabriel." Muhammad forever remembered Khadija with affection, gratitude and love. During her illness, he kept a nightlong vigil nursing her, comforting her and praying for her. He told her that Allah had promised Eternal Bliss to her, and had built for her a palace of pearls in Paradise.
Toward morning her frail frame could not endure the attack of fever any more and her sanctified and noble soul left this earth for its destination in Heaven where it entered the company of the immortals. Her death filled Muhammad's heart with sorrow. Khadija died on the tenth of Ramadan of the tenth year of the Proclamation of Islam. Khadija was buried in Hujun above Makka. Muhammad Mustafa, the Messenger of Allah, himself descended into her grave to lie in it for a few moments.
Then he assisted the other mourners in lowering the body into it. After the burial, he smoothed the earth on her grave. Thus died Khadija, the first woman to believe in the Oneness of the Creator. Peace on Khadija to whom Allah Ta'ala sent His greetings and salutations. Peace on Khadija for whom Allah Ta'ala built a palace of pearls in Paradise. Peace on Khadija, the best of women, and the chief of all women. Khadija died in 619.
One month after her death, Muhammad Mustafa had to sustain another shock in the death of Abu Talib, his uncle and guardian, and the bulwark of Islam. The death of these two friends - Khadija and Abu Talib - was the greatest shock that the Apostle of God had to endure in the fifty years of his life. The two lamps of his life were extinguished. He was overwhelmed with sorrow.