1 Samuel 6:6 - Ellicott's Commentary On The Whole Bible

As the Egyptians and Pharaoh hardened their hearts. — We have here the traditional account of the deliverance of Israel from Egypt, no doubt, as it was preserved in Philistia. These constant references to the story of Moses and the Exodus are indications of the deep impression those events had made on the surrounding nations; hence the value they set on the Ark, which they looked upon as the visible symbol of the mighty Hebrew God. The argument here used by the priests and diviners is: — You all remember the well-known story of the obduracy of the powerful Egyptians in connection with these Israelites, yet even they in the end had to let them go. You Philistines have had the experience of one plague; will you, like those foolish Egyptians, harden your hearts till you. like them, have been smitten with ten?”