18 And at these words about the ark of God, Eli, falling back off his seat by the side of the doorway into the town, came down on the earth so that his neck was broken and death overtook him, for he was an old man and of great weight. He had been judging Israel for forty years.
Matthew Henry's Commentary on 1 Samuel 4:18
Commentary on 1 Samuel 4:12-18
(Read 1 Samuel 4:12-18)
The defeat of the army was very grievous to Eli as a judge; the tidings of the death of his two sons, to whom he had been so indulgent, and who, as he had reason to fear, died impenitent, touched him as a father; yet there was a greater concern on his spirit. And when the messenger concluded his story with, "The ark of God is taken," he is struck to the heart, and died immediately. A man may die miserably, yet not die eternally; may come to an untimely end, yet the end be peace.