The Oath of Abraham?s Servant, c. 1650-1659. This work has long been called Journey of a Patriarch in the belief that the artist intended no specific subject. Recent research by graduate student Tamara Durn of Case Western Reserve University suggests that the painting instead depicts a moment in the Old Testament book of Genesis. Abraham secures a pledge from his servant to find a wife for Abraham?s son Isaac. The servant wears a zamt, a goatskin cap common in North Africa in the 1600s, here dyed an unusual shade of blue, a colour associated with faith and trust, symbolizing his sacred oath.