Apparently, that's how Biblical Hebrew expressed the jussive. German uses 3rd person subjunctive ("Meine Seele sterbe mit den Philistern"), Polish (and other Sl

Apparently, that's how Biblical Hebrew expressed the jussive. German uses 3rd person subjunctive ("Meine Seele sterbe mit den Philistern"), Polish (and other Slavic languages, I imagine) also uses 3rd person future but with explicit "let" thrown in: "Niech umrze dusza moja z Filistynami". But those are the older translations — those quotes are from Luther Bible (1534) and Gdansk Bible (1632); you can find newer translations that use the wording of "let me perish with the Philistines" variety as well.