'Instigation' in the Bible

Now in the seventh month Ishmael the son of Nethaniah, the son of Elishama, of the royal family [of David] and one of the princes of the king, came [at the instigation of the Ammonites] with ten men to Gedaliah the son of Ahikam in Mizpah. As they were eating a meal together there in Mizpah,