Esoteric Teachings of the Tibetan Tantra
Part I: Seven Initiation Rituals of the Tibetan Tantra: CHAPTER TWO — From the Treasury of Consciousness This Is

Thus he said. Because of the powerful influence of the Demon King Pehar, the cases of insanity [Tib. smyo] and nervous disturbance [abog] will be many, the cases of violent death will also be great in number.

[This remarkable prophecy is now explained further:]

In ancient times, there was an Indian scholar who was very fond of gold. He had devoted his lifetime to practicing the worship of Yamantaka and was about to achieve the Siddhis. But he raised dispute and became very angry; then the Black Yamantaka put him to death. Whereupon he became the Black King Demon called Hala. Later he came to Tibet and enslaved half of the Tibetan population.

Maji Lab Dran[r_2:11] (the greatest woman philosopher of Tibet) in her previous life was the Indian scholar Rin-Chin-Drab who subdued and converted many heretic philosophers of India. Among them there was a scholar who became very angry and revengeful after his defeat in debating with Rin-Chin-Drab. He then made a malignant vow and immediately flew away to a cave and died by committing suicide.

By the power of his malignant vow and hate [joined to all other evil], he became a plague-spreading gnome, the one who appeared in the form of life-and-vow-destroyer. He appeared both in the East and in the West. He spread all kinds of disease and made people insane and mentally disturbed. Furthermore, the King Demon Pehar then gathered all the breath of the oath-breakers[r_2:12] and made them his retinues, filling many countries like husks scattered by the wind pervading a whole valley.

This was prophesied [also by Padmasambhava]:

At that time half of the populations [of all nations] will become insane; most of the people will cut short their own lives

by themselves (suicide); and at that time China will become a dark land. Powerful men and wealth will follow the steps of the evil spirits and their three cousins[r_2:13]; all Tibet will be broken into small pieces. At that time, here in the Snow Country, the life and breath of the lamas, the officials, the teachers, the kings, the high officers, and those who follow the Buddhist teachings will be taken away (and persecuted). All the good teachers and virtuous persons will be cut in the middle by the evil demons. People will suffer excessively[r_2:14].

Thinking of benefitting the world [later on] at this miserable time, on the evening of the fifth lunar day--a significant date--in the year of Rooster, the Fierce Guru with Phurba himself (red and with one face) appeared before the Living Buddha, Mi-rgyur-rdo-rje, when he was thirteen years old, and imparted to him this initiation and teaching. Therefore this teaching is a very near one (to the original source), and has great power and blessing. If one attains this initiation and practices it many times, he may certainly cure the illness of Life-Prana[r_2:15] and the pain of fainting.