But when they had finished, Kai Kaous bade them desist from further bloodshed.
Then Kai Kaous wrote a letter unto the King of Mazinderan, and he counselled him that he should conclude a peace. And he related to him how that his mainstay was broken, for Rustem had overcome Arzang and slain the White Deev. And he said that Rustem would slay him also if he should not submit unto Iran and pay tribute to its Shah. Then Kai Kaous sent a messenger with this writing unto the King of Mazinderan.
Now the King, when he had read the letter, and learned how that Arzang and the White Deev and all his train were slain, was sore troubled, and he paled in his spirit, and it seemed to him that the sun of his glory was about to set. Howbeit he suffered not the messenger to behold his distress, but wrote haughty words unto Kai Kaous, and dared him to come forth to meet him. And he boasted of his might and reproached Kai Kaous with his folly. And he threatened that he would raze Iran unto the dust.
When Kai Kaous had read this answer he was wroth, and his nobles with him. And Rustem spake and said-"Permit me, O my Shah, that I go forth before the King of Mazinderan, and intrust unto me yet another writing."
Then Kai Kaous sent for a scribe, and the scribe cut a reed like to the point of an arrow, and he wrote with it the words that Kai Kaous dictated. And Kai Kaous made not many words. He bade the King lay aside his arrogance, and he warned him of the fate that would await his disobedience, and he said unto him that if he listened not he might hang his severed head on the walls of his own city. Then he signed the letter with his royal seal, and Rustem bore it forth from the camp.
Now when the King of Mazinderan learned that Kai Kaous sent him yet another messenger, he bade the flower of his army go forth to meet him. And Rustem, when he saw them come near, laid hold upon a tree of great stature and spreading branches that grew by the wayside.
And he uprooted the tree from the earth, and brandished it in his hands like to a javelin. And those that saw it were amazed at his strength. Then Rustem, when he beheld their awe, flung the tree among them, and many a brave man was dismounted by this mace. Then there stepped forth from the midst of the host one of the giants of Mazinderan, and he begged that he might grasp Rustem by the hand. And when he had hold of the hand of the Pehliva he pressed it with all his might, for he thought that he could wring off this hand of valour. But Rustem smiled at the feebleness of his grasp, and he grasped him in return, and the giant grew pale, and the veins started forth upon his hands.
Then one set off to tell the King what he had seen. And the King sent forth his doughtiest knight, and bade him retrieve the honour of their strength. And Kalahour the knight said-"Verily so will I do, and I will force the tears of pain from the eyes of this messenger."
And he came towards Rustem and wrung his hand, and his gripe was like to a vise, and Rustem felt the pang thereof, and he winced in his suffering. But he would not let the men of Mazinderan glory in his triumph. He took the hand of Kalahour in his own, and grasped it and crushed it till that the blood issued from its veins and the nails fell from off its fingers. Then Kalahour turned him and went before the Shah and showed unto him his hand. And he counselled him to make peace with the land that could send forth such messengers whose might none could withstand. But the King was loath to sue for peace, and he commanded that the messenger be brought before him.
Then the elephant-bodied stood before the King of Mazinderan. And the King questioned him of his journey, and of Kai Kaous, and of the road that he was come. And while he questioned he took muster of him with his eyes, and when he had done speaking he cried-"Surely thou art Rustem, for thou hast the arms and breast of a Pehliva."
But Rustem replied, "Not so, I am but a slave who is not held worthy to serve even in his train; for he is a Pehliva great and strong, whose like the earth hath not seen." Then he handed unto the King the writing of his master. But when the King had read it he was wild with anger, and he said to Rustem-"Surely he that hath sent thee is mad that he addresseth such words unto me. For if he be master in Iran, I am lord of Mazinderan, and never shall he call me his vassal. And verily it was his own overweening that let him fall between my hands, yet hath he learned no lesson from his disasters, but deemeth he can crush me with haughty words.
Go, say unto him that the King of Mazinderan will meet him in battle, and verily his pride shall learn to know humility."