Pe [פ] is the seventeenth letter of the Hebrew alphabet. It is also the Hebrew word for “mouth” and refers to the power of speech to change one’s world. (Not by coincidence, pe appears as “mouth” in the third verse of this section of Psalm 119, though not in connection with speech or power.) We can see how the word is used in scripture from Genesis forward, creating several intriguing Hebrew idioms. One example: Pharaoh says to Joseph, “All my people shall order themselves as you command.” The word “command” there is pê. What Pharaoh literally said is that all Egypt would conduct itself “according to Joseph’s mouth”.
That’s some pretty powerful speech, but then we worship a God who spoke our world into being.