2 Kings 25:25-26

25In the seventh month, however, Ishmael son of Nethaniah, the son of Elishama, who was of royal blood, came with ten men and assassinated Gedaliah and also the men of Judah and the Babylonians who were with him at Mizpah.

26At this, all the people from the least to the greatest, together with the army officers, fled to Egypt for fear of the Babylonians.