"that the people had fled": Now had they fled? Is it not written (Numbers 33:3) "On the morrow of the Pesach the children of Israel went out with a high hand"? — Because they had beaten his emissaries, they went and said to Pharaoh: Look, Israel beat us. They killed some of us and wounded others, and no one stopped them. They have no ruler and no officer, viz. (Mishlei 30:27) "The locusts have no king, and they all go out in a single swarm" (as their sprit moves them).