39. According to his vow. This seems to imply that he offered her as a burnt offering, according to his vow (see on 31). It has been suggested that the author of the book of Judges, with fine reserve, drew a veil over the tragic act of sacrifice.
On the other view that Jephthah did not offer up his daughter (see on 31) might be mentioned the following:
About 1200 Rabbi Kimchi, followed by many writers since, promulgated the view that Jephthah did not sacrifice his daughter. He said that the words “offer it up for a burnt offering” ( 31) would apply only if whatever met Jephthah should be a sacrificial animal. He interpreted verse 39 to mean that Jephthah built his daughter a house where she was secluded from men the rest of her life, in sacred celibacy, in order that all her moments might be dedicated to the Lord, and that there the virgins of Israel went annually to visit her and bewail her fate.
Against this interpretation of Kimchi’s is the fact that the customs of that day knew nothing about treating women as nuns. Perpetual virginity and childlessness were looked upon as the greatest of misfortunes. There is no law, usage, or custom in all the that in the least intimates that a single woman was looked upon as the more holy, more the Lord’s, or more fully devoted to Him than a married woman. It was no part of the law of the priests or Nazirites. Deborah and Huldah, both prophetesses, are particularly mentioned as married women. Moreover, if the daughter were to remain unmarried in harmony with such an unknown custom, the case would not have been so tragic as it is portrayed here; neither would she have needed two months to bewail her virginity, for she would have had the rest of her life to do that. All Jewish and Christian interpreters up to the time of Kimchi held to the natural intent of the passage, namely, that Jephthah sacrificed his daughter as an offering to the Lord, a thing that Abraham almost did to his son Isaac under different circumstances.
She knew no man. Or, “she had not known man.” See Gen. 24:16 for identical words in Hebrew.
It was a custom. These words really belong with the following verse.