Judges 15:20 Midrash

וַיִּשְׁפֹּ֧ט אֶת־יִשְׂרָאֵ֛ל בִּימֵ֥י פְלִשְׁתִּ֖ים עֶשְׂרִ֥ים שָׁנָֽה׃ (פ)

And he judged Israel in the days of the Philistines twenty years.

Read midrashic interpretation of Judges 15:20: and classical rabbinic exegesis.