According to Jacqueline Pirenne, numerous Sabaeans left south Arabia and crossed over the Red Sea to Ethiopia to escape from the Assyrians, who had devastated the kingdoms of Israel and Judah in the 8th and 7th centuries BCE. She says that a second major wave of Sabeans crossed over to Ethiopia in the 6th and 5th centuries BCE to escape Nebuchadnezzar II. This wave also included Jews fleeing from the Babylonian takeover of Judah. In both cases, the Sabeans are assumed to have departed later from Ethiopia to Yemen.