Commentary for the film's DVD edition chronicles the historical research done by DeMille and associates. Katherine Orrison says that many details of Moses' life left out of the Bible are present in the Quran, which was sometimes used as a source. She also presents some coincidences in production. The man who designed Moses' distinctive rust-white-and-black-striped robe used those colors because they looked impressive, and only later discovered that these are the actual colors of the Tribe of Levi. Arnold Friberg would later state that he was the one who designed Moses' costume. As a gift, after the production, DeMille gave Moses' robe to Friberg, who had it in his possession until his death in 2010. Moses' robe as worn by Charlton Heston was hand-woven by Dorothea Hulse, one of the world's finest weavers. She also created costumes for "The Robe", as well as textiles and costume fabrics for "Samson and Delilah", "David and Bathsheba", and others.