1 Samuel 5:4

“And when they arose early on the morrow morning, etc.] For the same purpose as before; unless they had any curiosity to indulge, to see whether the ark and Dagon agreed better together, if they had any suspicion that the former mischance was to be attributed to some variance and disagreement between them: behold, Dagon was fallen upon his face to the ground before the ark of the Lord: again, and in a worse condition than before: and the head of Dagon, and both the palms of his hands, were cut off upon the threshold; of the temple, upon which he fell with such force, that the threshold cut off his head, and both his hands; which signified he had neither wisdom to contrive for his own safety,…”

“Cut off - The head is the seat of wisdom; the hands the instruments of action: both are cut off to shew that he had neither wisdom nor strength to defend himself or his worshippers. Thus the priests by concealing Dagon's shame before, make it more evident and infamous. The stump - Heb. only dagon, that is, that part of it from which it was called Dagon, namely the fishy part, for Dag in Hebrew signifies a fish. It - Upon the threshold; there the trunk abode in the place where it fell, but the head and hands were slung to distant places. 1 Kings (1 Samuel) 5:5”

“5:4 his head and hands had broken off: A symbol of God’s supremacy over the idol (5:7; see also 17:51).”

“the head: Isa 2:18, Isa 2:19, Isa 27:9; Jer 10:11, Jer 50:2; Eze 6:4-6; Dan 11:8; Mic 1:7 of Dagon: The name of this idol, Dagon, signifies a fish, and it is supposed to be the Atergatis of the Syrians, corruptly called Derceto by the Greeks, which had the upper part like a woman, and the lower part like a fish; as Lucian informs us: Δερκετους δε ειδος εν Φοινικη εθεησαμην, θεημα ξενον; ημισεη μεν γυνη; το δε οκοσον εκ μηρων ες ακρους ποδας, ιχθυος ουρη αποτεινεται. "In Phoenicia I saw the image of Derceto; a strange sight truly! For she had the half of a woman, but from the thighs downward a fish's tail." Diodorus (1. ii.) describing the same idol, as represented at Askelon, says, το μεν…”

“But they were obliged to give up this notion when they found the god lying on his face upon the ground again the next morning in front of the ark of Jehovah, and in fact broken to pieces, so that Dagon's head and the two hollow hands of his arms lay severed upon the threshold, and nothing was left but the trunk of the fish (דּגון). The word Dagon, in this last clause, is used in an appellative sense, viz., the fishy part, or fish's shape, from דּג, a fish. המּפתּן is no doubt the threshold of the door of the recess in which the image was set up. We cannot infer from this, however, as Thenius has done, that with the small dimensions of the recesses in the ancient temples, if the image fell…”