Judges 11:36 in the King James Version
And she said unto him, My father, if thou hast opened thy mouth unto the LORD, do to me according to that which hath proceeded out of thy mouth; forasmuch as the LORD hath taken vengeance for thee of thine enemies, even of the children of Ammon.
Context
35 When he saw her, he tore his clothes, and said, “Alas, my daughter! You have brought me very low, and you are one of those who trouble me; for I have opened my mouth to the LORD, and I can’t go back.”
36 She said to him, “My father, you have opened your mouth to the LORD; do to me according to that which has proceeded out of your mouth, because the LORD has taken vengeance for you on your enemies, even on the children of Ammon.”
37 Then she said to her father, “Let this thing be done for me. Leave me alone two months, that I may depart and go down on the mountains, and bewail my virginity, I and my companions.”