The first occurrence.
And it came to pass in the days of Amraphel king of Shinar, Arioch king of Ellasar, Chedorlaomer king of Elam, and Tidal king of nations; Gen 14:1
The primitive root.
mem מ ם = the water, thus chaos, mighty, blood
lamed ל = the shepherd’s staff, thus teach, yoke, to, bind
kaph כ ך = the open palm, thus bend, open, allow, tame
The story: The mighty (mem, but may also carry the meaning of a blood line) who use their authority (lamed) to bless (kaph). We know from history that the bloodline kings used their authority to oppress, but this parable explains the duty of a king as it should be.