Judges 5:15; Judges 11:39

15 "And the princes of Issachar were with Deborah; As was Issachar, so was Barak; Into the valley they rushed at his heels; Among the divisions of Reuben There were great resolves of heart.
39 At the end of two months she returned to her father, who did to her according to the vow which he had made; and she had no relations with a man. Thus it became a custom in Israel,