Ur Kasdim, commonly translated as Ur of the Chaldeans, is a city mentioned in the Hebrew Bible as the birthplace of Abraham, the patriarch of the Israelites and the Ishmaelites. In 1862, Henry Rawlinson identified Ur Kaśdim with Tell el-Muqayyar near Nasiriyah in the Baghdad Eyalet of the Ottoman Empire. In 1927, Leonard Woolley excavated the site and identified it as a Sumerian archaeological site where the Chaldeans were to settle around the 9th century BC. Recent archaeology work has continued to focus on the location in Nasiriyah, where the ancient Ziggurat of Ur is located.

Abraham was a prophet and messenger of God according to Islam, and an ancestor to the Ishmaelite Arabs and Israelites. Abraham plays a prominent role as an example of faith in Judaism, Christianity, and Islam. In Muslim belief, Abraham fulfilled all the commandments and trials wherein God nurtured him throughout his lifetime. As a result of his unwavering faith in God, Abraham was promised by God to be a leader to all the nations of the world. The Quran extols Abraham as a model, an exemplar, obedient and not an idolater. In this sense, Abraham has been described as representing "primordial man in universal surrender to the Divine Reality before its fragmentation into religions separated from each other by differences in form". Muslims believe that the Kaaba in Mecca was built by Abraham and his son Ishmael as the first house of worship on earth. The Islamic holy day 'Eid ul-Adha is celebrated in commemoration of Abraham's willingness to sacrifice his son on God's command, as well as the end of the Hajj pilgrimage to the Kaaba.