The Caliph of Baghdad, al-Muqtadi [1075-1094], had given power to his vizier, Abu Shuja, [who] imposed that each male Jew should wear a yellow badge on his headgear. This was one distinctive sign on the head and the other was on the neck- a piece of lead of the weight of a silver dinar hanging round the neck of every Jew and inscribed with the word dhimmi to signify that the Jew had to pay poll-tax. Jews also had to wear girdles round their waists. Abu Shuja further imposed two signs on Jewish women. They had to wear a black and a red shoe, and each woman had to have a small brass bell on her neck or shoe, which would tinkle and thus announce the separation of Jewish from Gentile [Muslim] women. He assigned cruel Muslim men to spy upon Jewish women, in order to oppress them with all kinds of curses, humiliation, and spite. The Gentile population used to mock all the Jews, and the mob and their children used to beat up the Jews in all the streets of Baghdad. When a Jew died, who had not paid up the poll-tax [jizya] to the full and was in debt for a small or large amount, the Gentiles did not permit burial until the poll-tax was paid. If the deceased left nothing of value, the Gentiles demanded that other Jews should, with their own money, meet the debt owed by the deceased in poll-tax; otherwise they [threatened] they would burn the body. (Scheiber, A. "The Origins of Obadyah, the Norman Proselyte" Journal of Jewish Studies (Oxford), Vol. 5, 1954, p. 37.)