Judges 11:37-39

37Then she said to her father, “Do me a favor. Give me two months for my friends and me to walk in the mountains and mourn that I will never have an opportunity to get married.”

38“Go!” he said, and he sent her off for two months. She and her friends went to the mountains, and she cried about never being able to get married.

39At the end of those two months she came back to her father. He did to her what he had vowed, and she never had a husband. So the custom began in Israel