The first occurrence.
This is the book of the generations of Adam. In the day that God created man, in the likeness of God He made him. Gen 5:1
The primitive root.
sin ס = the thorn, thus grab, hate, protect
pey ף, פ = the mouth, thus open, blow, scatter, edge
resh ר = the head of man, thus head, first, top, beginning, man
The story being told is of a turned (sin, as one turns away from a thorn to avoid it) lip (pey), i.e., the gathered, as the turned bowl with a lip gathers together whatever it contains, thoughts of a man (resh, i.e., that which proceeds from the man’s head).