Albert Barnes Commentary Ecclesiastes 8:10

"So I saw the wicked buried, and they came [to the grave]; and they that had done right went away from the holy place, and were forgotten in the city: this also is vanity." — Ecclesiastes 8:10 (ASV)

That is, “I saw wicked (rulers) buried, who came into the world and went from the Holy place (the seat of authority and justice, Deuteronomy 19:17; 2 Chronicles 19:6), and they were forgotten in the city where they had so ruled to the detriment of their subjects: this—their death and oblivion—shows their lot also to be vanity.” Others interpret the verse: “I have seen wicked men buried; and (others) came into the world, and from the Holy place they went out of the world, and were forgotten in the city where they had done rightly” (compare 2 Kings 7:9).