Jamieson, Fausset and Brown on Judges 16:23

Jud 16:23-25. Their Feast to Dagon.

23. the lords of the Philistines gathered them together for to offer a great sacrifice unto Dagon--It was a common practice in heathen nations, on the return of their solemn religious festivals, to bring forth their war prisoners from their places of confinement or slavery; and, in heaping on them every species of indignity, they would offer their grateful tribute to the gods by whose aid they had triumphed over their enemies. Dagon was a sea idol, usually represented as having the head and upper parts human, while the rest of the body resembled a fish.