Judith 11:17

17 For thy servant is religious, and serveth the God of heaven day and night: now therefore, my lord, I will remain with thee, and thy servant will go out by night into the valley, and I will pray unto God, and he will tell me when they have committed their sins:

Judith 11:17 In-Context

15 Now when they shall bring them word, they will forthwith do it, and they shall be given to thee to be destroyed the same day.
16 Wherefore I thine handmaid, knowing all this, am fled from their presence; and God hath sent me to work things with thee, whereat all the earth shall be astonished, and whosoever shall hear it.
17 For thy servant is religious, and serveth the God of heaven day and night: now therefore, my lord, I will remain with thee, and thy servant will go out by night into the valley, and I will pray unto God, and he will tell me when they have committed their sins:
18 And I will come and shew it unto thee: then thou shalt go forth with all thine army, and there shall be none of them that shall resist thee.
19 And I will lead thee through the midst of Judea, until thou come before Jerusalem; and I will set thy throne in the midst thereof; and thou shalt drive them as sheep that have no shepherd, and a dog shall not so much as open his mouth at thee: for these things were told me according to my foreknowledge, and they were declared unto me, and I am sent to tell thee.

The Brenton translation of the Septuagint is in the public domain.