Pe is the seventeenth letter of the Hebrew alphabet.

The gematria of Pe is 80.

As it says in Ethics of Our Fathers: “When one is eighty years old, he has reached a special strength.” Therefore we find: “Eighty thousand men by the name of Aaron all followed Aaron to his final resting place.” The reason there were eighty thousand men by the name of Aaron is as follows: We know Aaron was a great speaker. When G‑d asked Moses to speak to Pharaoh, Moses demurred, saying that he had a speech impediment. G‑d responded, “Is there not your brother, Aaron the Levite? I know that he can speak well.”

Aaron’s verbal skills also served him well as a marriage counselor. When there was a fight between a couple and the husband or wife left, Aaron became the peace­maker, appeasing them with soothing words. When the reunited couple gave birth to its next child, they invariably said, “We will name the child after Aaron the High Priest.” He reunited so many couples that thousands of children were named Aaron. Thus the number eighty (thousand) here signifies the special strength of the pe, the mouth.

Moses was eighty years old when he led the Jews out of Egypt and eighty when he transmitted the Torah to them.