By Jacob Lumbroso Next to lighting candles on Friday just before sunset, the Kiddush cup is perhaps the most common symbol of the Jewish Sabbath The purpose is connected to the singing or chanting of Kiddush The word Kiddush is derived from the Hebrew word Kedushah, which means holiness Reciting Kiddush designates the special status of the Sabbath The Sabbath is considered holy or set apart from the rest of the days of the week