'Fulfilled' in the Bible

She said, “I will certainly go with you; nevertheless, the journey that you are about to take will not be for your honor and glory, because the Lord will sell Sisera into the hand of a woman.” Then Deborah got up and went with Barak to Kedesh.

Later, after the two months were concluded, she returned to her father, and he fulfilled what he had solemnly vowed and she never married. That's how the custom arose in Israel