Комментарий к Шофтим 6:1

Acted wickedly. Until this period, Scripture states, "They resumed [acting wickedly]" since their iniquities accumulated. However, through this hymn¹Sung by Devorah and Barak [ch.5]. they were granted forgiveness for all that they had perpetrated.²Anyone rescued miraculously who then sings a hymn of praise forgiven all his sins, as if he had been newly created. (Yalkut, 60) But now they began sinning anew. This interpretation is in Agadas Tehilim.