What information is there concerning the marriage of the Prophet Muhammad to Khadijah?

The Prophet, peace and blessings be upon him, married Khadijah, may Allah be pleased with her, who was a woman of noble lineage and beauty. The Prophet went out for her trade to the market of Busra and earned double the usual profit. Khadijah sent Nafisah to propose marriage to him, and the Prophet accepted and married her when he was twenty-five years old. Her uncle, Amr, was the one who gave her in marriage. Khadijah was forty years old when she married the Prophet, and she had rejected many noblemen of Quraysh to marry him.