בִּימֵ֞י שַׁמְגַּ֤ר בֶּן־עֲנָת֙ בִּימֵ֣י יָעֵ֔ל חָדְל֖וּ אֳרָח֑וֹת וְהֹלְכֵ֣י נְתִיב֔וֹת יֵלְכ֕וּ אֳרָח֖וֹת עֲקַלְקַלּֽוֹת׃
In the days of Shamgar the son of Anath, In the days of Jael, the highways ceased, And the travellers walked through byways.
Rashi on Judges
In the days of Shamgar ben Anas, in the days of Yael. This teaches that Yael, too, judged Yisroel in her days.
Metzudat David on Judges
In the days of Shamgar: However during the days of the Judge, Shamgar, and during the days of Yael - since she also judged in the days of Shamgar - the salvation was not complete. So the nations did not tremble from fear of the Lord. And because of this, travelers on the ways ceased - due to fear of the nations.