Bible (DRV) Apocrypha/Deuterocanon: Book of Judith

The story revolves around Judith, a daring and beautiful widow, who is upset with her Jewish countrymen for being unwilling to engage their foreign conquerors. She goes with her loyal if reluctant maid Abra to the camp of the enemy general, Holofernes, to whom she slowly ingratiates herself, promising him both sexual favors and information on the Israelites. Gaining his trust (though not having delivered on either promise), she is allowed access to his tent one night as he lies in a drunken stupor. She decapitates him, then takes his head back to her fearful countrymen. The Assyrians, having lost their leader, disperse, and Israel is saved. Though she is courted by many, she remains unmarried for the rest of her life. (Summary by Wikipedia)