In consequence of the illness of Lohurásp, who was nearly at the point of death, Zerdusht went to Balkh for the purpose of administering relief to him, and he happily succeeded in restoring him to health. On his return he was received with additional favor by Gushtásp, who immediately afterwards became his disciple. Zerdusht then told him that he was the prophet of God, and promised to show him miracles. He said he had been to heaven and to hell. He could send anyone, by prayer, to heaven; and whomsoever he was angry with he could send to hell. He had seen the seven mansions of the celestial regions, and the thrones of sapphires, and all the secrets of heaven were made known to him by his attendant angel. He said that the sacred book, called Zendavesta, descended from above expressly for him, and that if Gushtásp followed the precepts in that blessed volume, he would attain celestial felicity. Gushtásp readily became a convert to his principles, forsaking the pure adoration of God for the religion of the fire-worshippers.
The philosopher further said that he had prepared a ladder, by which he had ascended into heaven and had seen the Almighty. This made the disciple still more obedient to Zerdusht. One day he asked Gushtásp why he condescended to pay tribute to Arjásp; "God is on thy side," said he, "and if thou desirest an extension of territory, the whole country of Chin may be easily conquered." Gushtásp felt ashamed at this reproof, and to restore his character, sent a dispatch to Arjásp, in which he said, "Former kings who paid thee tribute did so from terror only, but now the empire is mine; and it is my will, and I have the power, to resist the payment of it in future." This letter gave great offence to Arjásp; who at once suspected that the fire-worshipper, Zerdusht, had poisoned his mind, and seduced him from his pure and ancient religion, and was attempting to circumvent and lead him to his ruin. He answered him thus: "It is well known that thou hast now forsaken the right path, and involved thyself in darkness. Thou hast chosen a guide possessed of the attributes of Iblís, who with the art of a magician has seduced thee from the worship of the true God, from that God who gave thee thy kingdom and thy grandeur. Thy father feared God, and became a holy Dírvesh, whilst thou hast lost thy way in wickedness and impiety. It will therefore be a meritorious action in me to vindicate the true worship and oppose thy blasphemous career with all my demons. In a month or two I will enter thy kingdom with fire and sword, and destroy thy authority and thee. I would give thee good advice; do not be influenced by a wicked counsellor, but return to thy former religious practices. Weigh well, therefore, what I say." Arjásp sent this letter by two of his demons, familiar with sorcery; and when it was delivered into the hands of Gushtásp, a council was held to consider its contents, to which Zerdusht was immediately summoned. Jamásp, the minister, said that the subject required deep thought, and great prudence was necessary in framing a reply; but Zerdusht observed, that the only reply was obvious—nothing but war could be thought of. At this moment Isfendiyár gallantly offered to lead the army, but Zarír, his uncle, objected to him on account of his extreme youth, and proposed to take the command himself, which Gushtásp agreed to, and the two demon-envoys were dismissed. The answer was briefly as follows:—
"Thy boast is that thou wilt in two short months
Ravage my country, scathe with fire and sword
The empire of Irán; but on thyself
Heap not destruction; pause before thy pride
Hurries thee to thy ruin. I will open
The countless treasures of the realm; my warriors,
A thousand thousand, armed with shining steel,
Shall overrun thy kingdom; I myself
Will crush that head of thine beneath my feet."
The result of these menaces was the immediate prosecution of the war, and no time was lost by Arjásp in hastening into Irán.
Plunder and devastation marked his course,
The villages were all involved in flames,
Palace of pride, low cot, and lofty tower;
The trees dug up, and root and branch destroyed.
Gushtásp then hastened to repel his foes;
But to his legions they seemed wild and strange,
And terrible in aspect, and no light
Could struggle through the gloom they had diffused,
To hide their progress.
Zerdusht said to Gushtásp, "Ask thy vizir, Jamásp, what is written in thy horoscope, that he may relate to thee the dispensations of heaven." Jamásp, in reply to the inquiry, took the king aside and whispered softly to him: "A great number of thy brethren, thy relations, and warriors will be slain in the conflict, but in the end thou wilt be victorious." Gushtásp deeply lamented the coming event, which involved the destruction of his kinsmen, but did not shrink from the battle, for he exulted in the anticipation of obtaining the victory. The contest was begun with indescribable eagerness and impetuosity.
Approaching, each a prayer addrest
To Heaven, and thundering forward prest;
Thick showers of arrows gloomed the sky,
The battle-storm raged long and high;
Above, black clouds their darkness spread,
Below, the earth with blood was red.
Ardshír, the son of Lohurásp, and descended from Kai-káús, was one of the first to engage; he killed many, and was at last killed himself. After him, his brother Shydasp was killed. Then Bishú, the son of Jamásp, urged on his steed, and with consummate bravery destroyed a great number of warriors. Zarír, equally bold and intrepid, also rushed amidst the host, and whether demons or men opposed him, they were all laid lifeless on the field. He then rode up towards Arjásp, scattered the ranks, and penetrated the headquarters, which put the king into great alarm: for he exclaimed:—"What, have ye no courage, no shame! whoever kills Zarír shall have a magnificent reward." Bai-derafsh, one of the demons, animated by this offer, came forward, and with remorseless fury attacked Zarír. The onset was irresistible, and the young prince was soon overthrown and bathed in his own blood. The news of the unfortunate catastrophe deeply affected Gushtásp, who cried, in great grief: "Is there no one to take vengeance for this?" when Isfendiyár presented himself, kissed the ground before his father, and anxiously asked permission to engage the demon. Gushtásp assented, and told him that if he killed the demon and defeated the enemy, he would surrender to him his crown and throne.
"When we from this destructive field return,
Isfendiyár, my son, shall wear the crown,
And be the glorious leader of my armies."
Saying this, he dismounted from his famous black horse, called Behzád, the gift of Kai-khosráu, and presented it to Isfendiyár. The greatest clamor and lamentation had arisen among the Persian army, for they thought that Bai-derafsh had committed such dreadful slaughter, the moment of utter defeat was at hand, when Isfendiyár galloped forward, mounted on Behzád, and turned the fortunes of the day. He saw the demon with the mail of Zarír on his breast, foaming at the mouth with rage, and called aloud to him, "Stand, thou murderer!" The stern voice, the valor, and majesty of Isfendiyár, made the demon tremble, but he immediately discharged a blow with his dagger at his new opponent, who however seized the weapon with his left hand, and with his right plunged a spear into the monster's breast, and drove it through his body. Isfendiyár then cut off his head, remounted his horse, and that instant was by the side of Bishú, the son of the vizir, into whose charge he gave the severed head of Bai-derafsh, and the armor of Zarír. Bishú now attired himself in his father's mail, and fastening the head on his horse, declared that he would take his post close by Isfendiyár, whatever might betide. Firshaid, another Iránian warrior, came to the spot at the same moment, and expressed the same resolution, so that all three, thus accidentally met, determined to encounter Arjásp and capture him. Isfendiyár led the way, and the other two followed. Arjásp, seeing that he was singled out by three warriors, and that the enemy's force was also advancing to the attack in great numbers, gave up the struggle, and was the first to retreat. His troops soon threw away their arms and begged for quarter, and many of them were taken prisoners by the Iránians. Gushtásp now approached the dead body of Zarír, and lamenting deeply over his unhappy fate, placed him in a coffin, and built over him a lofty monument, around which lights were ever afterwards kept burning, night and day; and he also taught the people the worship of fire, and was anxious to establish everywhere the religion of Zerdusht.