Judith 14:10

10 And when Achior had seen all that the God of Israel had done, he believed in God greatly, and circumcised the flesh of his foreskin, and was joined unto the house of Israel unto this day.

Judith 14:10 In-Context

8 Now therefore tell me all the things that thou hast done in these days. Then Judith declared unto him in the midst of the people all that she had done, from the day that she went forth until that hour she spake unto them.
9 And when she had left off speaking, the people shouted with a loud voice, and made a joyful noise in their city.
10 And when Achior had seen all that the God of Israel had done, he believed in God greatly, and circumcised the flesh of his foreskin, and was joined unto the house of Israel unto this day.
11 And as soon as the morning arose, they hanged the head of Holofernes upon the wall, and every man took his weapons, and they went forth by bands unto the straits of the mountain.
12 But when the Assyrians saw them, they sent to their leaders, which came to their captains and tribunes, and to every one of their rulers.

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