perhaps these are the ones mapes told us of.
are you trained in the ways of the desert?
i will take the boy-man.  he shall have sanctuary in my tribe.
stop! get back!! she has the weirding way. why didn't you tell us! great gods.  if you can do this to the strongest of us you're worth ten times your weight of water. as a leader of my people i give you my bond: teach us this weirding way and you both shall have sanctuary. your water shall mingle with our water.
you have strength.  real strength.  you shall be known as usul, which is the strength of the base of the pillar. this is your secret name in our troop. but you must choose the name of manhood which we will call you openly.
we call that one muad'dib.
you are paul muad'dib, and your mother shall be a sayyadina among us.  we welcome you.
greater than treasure, usul. we have thousands of such caches. only a few of us know them all. when we have enough.  we shall change the face of arrakis. listen!.
the rocks of arrakis hold many secrets.
sayyadina. our reverend mother tells me she is too old.  she has been calling through space and time for you to come and let her rest. she asks that you pass within.
death may be the result.  are you sure?
do you know the water of life?.  come.  . watch.  the mystery of mysteries.  the end and the beginning.
the water of life.
usul.  these are fifteen of our fiercest fighters to serve you as your guard.  the fedaykin.
usul.  it is time you become a sandrider.  and travel as a fremen. take the kiswa maker hook of our sietch and ride as a leader of men.
two thumpers are planted. the worm may not surface for the first - he will rise for the second. remember, when the worm approaches, you must be utterly still.  and close enough to plant the hook firmly under a ring segment.  the worm will turn to lift this exposed area as far from the abrasive sand as possible and it will take you with it -- to the top. do not get too close as he approaches.  the sand will engulf you.  wait till the head of the worm passes -- then go.  quickly.
usul has called a big one. again.  it is the legend.
too bad.  thought they were harkonnen.
long live the fighters!
usul.  we have wormsign, the likes of which even god has never seen.