Muhammad was born in Mecca in 570 AD. His father died shortly before his birth, and he lost his mother at the age of six. The young orphan was then raised primarily by his uncle, for whom he worked as a shepherd. At age 9, he joined his uncle on a caravan to Syria. As a young man, Muhammad worked as a camel driver between Syria and Arabia. Soon he established a career managing caravans on behalf of merchants. Through his travel first with his uncle and later in his career, Muhammad came into contact with people of many nationalities and faiths, including Jews, Christians and pagans. At age 25, Muhammad was employed by Khadija, a wealthy Meccan widow. The two were married, and by all accounts enjoyed a loving and happy marriage. Early records report that "God comforted him through her, for she made his burden light." Although polygamy was common practice at the time, Muhammad took no other wife than Khadija until her death 24 years later.