Judith 7:13

13 for this is where all the people of Bethulia get their water. So thirst will destroy them, and they will surrender their town. Meanwhile, we and our people will go up to the tops of the nearby mountains and camp there to keep watch to see that no one gets out of the town.

Judith 7:13 In-Context

11 Therefore, my lord, do not fight against them in regular formation, and not a man of your army will fall.
12 Remain in your camp, and keep all the men in your forces with you; let your servants take possession of the spring of water that flows from the foot of the mountain,
13 for this is where all the people of Bethulia get their water. So thirst will destroy them, and they will surrender their town. Meanwhile, we and our people will go up to the tops of the nearby mountains and camp there to keep watch to see that no one gets out of the town.
14 They and their wives and children will waste away with famine, and before the sword reaches them they will be strewn about in the streets where they live.
15 Thus you will pay them back with evil, because they rebelled and did not receive you peaceably."
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.