of Persia, Alexander the Great introduced Persian etiquette into his own court, including the practice of proskynesis. Visitors, depending on their ranks, would have to prostrate themselves, bow to, kneel in front of, or kiss the king. His Greek countrymen objected to this practice, as they considered these rituals only suitable to the gods. In countries with recognized social classes, bowing to nobility and royalty is customary. Standing bows of obeisance all involve bending forward from the waist with the eyes downcast, though variations in the placement of the arms and feet are seen. In western European cultures, women do not bow, they "curtsey" (a contraction of courtesy that became its own word), a movement in which one foot is moved back and the entire body lowered to a crouch while the head is bowed. The European formal greeting used from men to women can be transformed into an obeisance gesture by holding the suzerain's hand with both hands. This kind of respect is due to kings, princes, sovereigns (in their kingdoms), archbishops (in their metropolitan province) or the Pope (everywhere). In ultra-formal ceremonies (a coronation, oath of allegiance or episcopal inauguration) the right knee shall touch the ground. In South Asia traditions, obeisance also involves prostrating oneself before a king. Many religious believers kneel in prayer, and some (Roman Catholics, and Anglicans) genuflect, bending one knee to touch the ground, at various points during religious services; the Orthodox Christian equivalent is a deep bow from the waist, and as an especially solemn obeisance the Orthodox make prostrations, bending down on both knees and touching the forehead to the floor. Roman Catholics also employ prostrations on Good Friday and at ordinations. During Islamic prayer, a kneeling bow called sajdah is used, with forehead, nose, hands, knees, and toes all touching the ground. Jews bow from the waist many times during prayer. Four times during the Yom Kippur service, and once on each day of Rosh Hashanah, many Jews will kneel and then prostrate. With the Salvation Army, when becoming a soldier, at a christening or other official event, underneath the flag, a salute is often used. This involves holding the hand, palm forwards, with all the fingers held in a clenched fist position. The index finger is left raised pointing towards God, and the hand is often held at chest height, in a similar position to that of Girl Guides.