Ecclesiastes 1:1; Ecclesiastes 1:12; Ecclesiastes 1:16

1 These are the words of the Teacher, King David's son, who ruled in Jerusalem.
12 I, the Teacher, was king of Israel, and I lived in Jerusalem.
16 I said to myself, "Look, I am wiser than any of the kings who ruled in Jerusalem before me. I have greater wisdom and knowledge than any of them."