From "Manual of Muad'Dib" by the Princess Irulan

This was not as we planned it , Jessica thought.
"Repeat after me, Stilgar," Paul said, and he called up the words of investiture as he had heard his own father use them. "I, Stilgar, take this knife from the hands of my Duke."
"I, Stilgar, take this knife from the hands of my Duke," Stilgar said, and accepted the milky blade from Paul.
"Where my Duke commands, there shall I place this blade," Paul said.
Stilgar repeated the words, speaking slowly and solemnly.
Remembering the source of the rite, Jessica blinked back tears, shook her head. I know the reasons for this , she thought. I shouldn't let it stir me .
"I dedicate this blade to the cause of my Duke and the death of his enemies for as long as our blood shall flow," Paul said.
Stilgar repeated it after him.
"Kiss the blade," Paul ordered.
Stilgar obeyed, then, in the Fremen manner, kissed Paul's knife arm. At a nod from Paul, he sheathed the blade, got to his feet.
A sighing whisper of awe passed through the crowd, and Jessica heard the words: "The prophecy—A Bene Gesserit shall show the way and a Reverend Mother shall see it." And, from farther away: "She shows us through her son!"
"Stilgar leads this tribe," Paul said. "Let no man mistake that. He commands with my voice. What he tells you, it is as though I told you."
Wise , Jessica thought. The tribal commander must lose no face among those who should obey him .
Paul lowered his voice, said: "Stilgar, I want sandwalkers out this night and cielagos sent to summon a Council Gathering. When you've sent them, bring Chatt, Korba and Otheym and two other lieutenants of your own choosing. Bring them to my quarters for battle planning. We must have a victory to show the Council of Leaders when they arrive."
Paul nodded for his mother to accompany him, led the way down off the ledge and through the throng toward the central passage and the living chambers that had been prepared there. As Paul pressed through the crowd, hands reached out to touch him. Voices called out to him.
"My knife goes where Stilgar commands it, Paul-Muad'Dib! Let us fight soon, Paul-Muad'Dib! Let us wet our world with the blood of Harkonnens!"
Feeling the emotions of the throng, Jessica sensed the fighting edge of these people. They could not be more ready. We are taking them at the crest , she thought.
In the inner chamber, Paul motioned his mother to be seated, said: "Wait here." And he ducked through the hangings to the side passage.
It was quiet in the chamber after Paul had gone, so quiet behind the hangings that not even the faint soughing of the wind pumps that circulated air in the sietch penetrated to where she sat.
He is going to bring Gurney Halleck here , she thought. And she wondered at the strange mingling of emotions that filled her. Gurney and his music had been a part of so many pleasant times on Caladan before the move to Arrakis. She felt that Caladan had happened to some other person. In the nearly three years since then, she had become another person. Having to confront Gurney forced a reassessment of the changes.
Paul's coffee service, the fluted alloy of silver and jasmium that he had inherited from Jamis, rested on a low table to her right. She stared at it, thinking of how many hands had touched that metal. Chani had served Paul from it within the month.
What can his desert woman do for a Duke except serve him coffee? she asked herself. She brings him no power, no family. Paul has only one major chance—to ally himself with a powerful Great House, perhaps even with the Imperial family. There are marriageable princesses, after all, and every one of them Bene Gesserit trained .
Jessica imagined herself leaving the rigors of Arrakis for the life of power and security she could know as mother of a royal consort. She glanced at the thick hangings that obscured the rock of this cavern cell, thinking of how she had come here—riding amidst a host of worms, the palanquins and pack platforms piled high with necessities for the coming campaign.