Judges 15:20 in the King James Version
And he judged Israel in the days of the Philistines twenty years.
Context
19 But God split the hollow place that is in Lehi, and water came out of it. When he had drunk, his spirit came again, and he revived. Therefore its name was called En Hakkore, which is in Lehi, to this day.
20 He judged Israel twenty years in the days of the Philistines.