Rabbi Jacob Milgrom, considered by many as the world's foremost authority on the biblical book of Leviticus, died on Tuesday at the age of 87.Relatives say he died on Sunday at Hadassah University Hospital in Jerusalem of a brain hemorrhage after a fall.Milgrom wrote a three-volume series on Leviticus, interpreting Jewish dietary and purification rituals as well as the Bible's position on homosexuality. He concluded the ban on homosexuality applies only to Jewish men.