1 Samuel 5:3-5

And when the people of Ashdod rose early the next day, behold, Dagon had fallen face downward on the ground before the ark of the LORD. So they took Dagon and put him back in his place. But when they rose early on the next morning, behold, Dagon had fallen face downward on the ground before the ark of the LORD, and the head of Dagon and both his hands were lying cut off on the threshold. Only the trunk of Dagon was left to him. This is why the priests of Dagon and all who enter the house of Dagon do not tread on the threshold of Dagon in Ashdod to this day.