The final words of this passage add that Samson had judged Israel twenty years.
Yet his judgeship achieved no rest for the people. Israel is still in bondage when we come to the end of the judge narratives in the book. We are still looking for somebody better than this, to deliver God’s people.
31 Then his brothers and all his family came down and took him and brought him up and buried him between Zorah and Eshtaol in the tomb of Manoah his father. He had judged Israel twenty years.