He probably stuck the handle into the ground and leaned on the point so the sword would go through his body as he fell down. The action is a metonym for the result, death. See how you translated this in [1 Chronicles 10:4](./04.md). AT: "killed himself with his sword" (See: [[rc://en/ta/man/translate/figs-metonymy]])
The word "died" is understood from the previous phrase. It can be repeated. AT: "and his 3 sons died" (See: [[rc://en/ta/man/translate/figs-ellipsis]] and [[rc://en/ta/man/translate/translate-numbers]])