Meanwhile, Antigonus the Hasmonean endeavored to seize the Jewish throne; and in Jerusalem there were frequent conflicts between his retainers and those of the two brothers, which were especially perilous on the Jewish Feast of Shavuot. Phasael defended the walls, and Herod the palace, thus routing their antagonists, whereupon Antigonus invoked the aid of the Parthian Empire. In spite of Herod's warning, Phasael allowed himself to be lured with Hyrcanus to the camp of the Parthian leader Barzapharnes under the pretext of peace talks.