The story of Judith and Holofernes can be found in apocryphal Book of Judith.
Judith, a rich and beautiful widow from the town of Bethulia, was respected for her devotion to God. The Assyrian army under commander Holofernes besieged Bethulia. Judith came to the Assyrian camp. She managed to deceive Holofernes with a false report about the situation in the besieged town. Invited to a private party with Holofernes, she waited until he got drunk and chopped his head off. She brought the head to Bethulia. Next day Bethulian soldiers, armed with the head of the enemys commander, managed to drive them away.