Judges 11:30-40 Complete Jewish Bible (CJB)
30 Yiftach made a vow to Adonai: “If you will hand the people of ‘Amon over to me, 31 then whatever comes out the doors of my house to meet me when I return in peace from the people of ‘Amon will belong to Adonai; I will sacrifice it as a burnt offering.” 32 So Yiftach crossed over to fight the people of ‘Amon, and Adonai handed them over to him. 33 He killed them from ‘Aro‘er until you reach Minnit, twenty cities, all the way to Avel-K’ramim; it was a massacre. So the people of ‘Amon were defeated before the people of Isra’el.
34 As Yiftach was returning to his house in Mitzpah, his daughter came dancing out to meet him with tambourines. She was his only child; he had no other son or daughter. 35 When he saw her, he tore his clothes and said, “Oh, no, my daughter! You’re breaking my heart! Why must you be the cause of such pain to me? I made a vow to Adonai, and I can’t go back on my word.” 36 She said to him, “Father, you made a vow to Adonai; so do whatever you said you would do to me; because Adonai did take vengeance on your enemies the people of ‘Amon.” 37 Then she said to her father, “Just do this one thing for me — let me be alone for two months. I’ll go away into the mountains with my friends and mourn, because I will die without getting married.” 38 “You may go,” he answered, and he sent her away for two months. She left, she and her friends, and mourned in the mountains that she would die unmarried. 39 After two months she returned to her father, and he did with her what he had vowed; she had remained a virgin. So it became a law in Isra’el 40 that the women of Isra’el would go every year for four days to lament the daughter of Yiftach from Gil‘ad.