“The fool will increase words; man does not know what will be, and what will be after him, who can tell him” (Ecclesiastes 10:14). “The fool will increase words” – Rabbi Berekhya in the name of Rabbi Simon interpreted the verse regarding Moses. The Holy One blessed be He said to Moses: I wrote in your regard that you are wise, but you are standing and speaking extensively, and you are not wise, “do not continue to speak to Me further about this matter” (Deuteronomy 3:26).
Even Moses Talked Too Much and Paid the Price
Kohelet Rabbah 14:1