It is not sutra, but Tantra class of text.
The Prayer of Kuntuzangpo, The Primordial Buddha Samantabhadra
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This prayer was taken from the ninth chapter of the Dzogchen
Teachings of the Gongpa Zangthal the Northern Treasures discovered
by the Terton Rigdzin Godem.
http://lotusgardens.org/kunzanggongpazangthal/photoessay/
Künzang Gongpa Zangthal (kun bzang dgongs pa zang thal)
is the highest Dzogchen teachings of the Northern Treasures
tradition. Gongpa Zangthal is in five volumes and was concealed by
Guru Rinpoche and later revealed by Rigzin Gödem (1337-1408), the
master who founded the Jangter (Northern Trasures) tradition of the
Nyingma school. Künzang Gongpa Zangthal meaning 'Showing Directly
the Realization of Samantabhadra' also contains the renowned
'Aspiration of Samantabhadra.' Often referred to as Gongpa Zangthal
(Unimpeded Realization), these teachings are said to be the heart
teachings of Guru Padmasambhava. Gongpa Zangthal is renowned as one
of the most sublime works on Dzogpa Chenpo among Padmasambhava’s
vast body of teachings. Dudjom Rinpoche wrote in his History of the
Nyingma School that the Northern Treasures were bestowed to help
the king and his descendents but they subsequently served all
Tibetans like a faithful minister.
The three foremost tertöns (treasure revealers) of Tibet who
were the supreme body, speech and mind emanations of Guru Rinpoche
himself were Nyang Rel Nyima Özer (body emanation), Guru Chökyi
Wangchuk (speech emanation) and Rigzin Gödem (mind emanation). The
treasures discovered by Nyang Rel Nyima Özer and Guru Chöwang and
the lineages that arose from them came to be known as Lhoter or the
Southern Treasures since they were discovered south of the Tsangpo
river. The treasures discovered by Rigzin Gödem and the lineage
that arose from them are called Jangter or the Northern Treasures
since they were discovered north of the Tsangpo river.
Rigzin Gödem was the re-incarnation of Nanam Dorje Düdjom, one
of the closest disciples of Padmasambhava. He was born in 1337 in a
family renowned for holding profound Vajrakilaya transmissions. In
accordance with a prophecy, when he was young five protuberances
looking like vulture feathers grew on his head. He thus became
famous as Rigzin Gödem—the Vidyadhara with Vulture feathers on his
head. Before departing Tibet, Padmasambhava placed a number of
texts and various sacred objects in a maroon leather casket and
concealed them in a cave called Zangzang Lhadrak. These were the
Northern treasures. In 1366, Vidyadhara Gödem took the casket out
of the cave of Zangzang Lhadrak. The casket had five containers
made of various precious materials and each one in a different
color. These five containers with their contents later became known
within the lineage as the Dzö Nga (mdzod lnga) or Five
Treasuries. The central container was deep red and of leather. The
eastern container was white and made of conch shell. The southern
container was golden and made of gold. The western container was
red and of copper. The northern container was black and made of
iron. These texts covered a great variety of topics: prayers such
as Le'u Dünma (Prayer in Seven Chapters), sadhanas such as Jangter
Kagyed, rituals, Dzogchen instructions and so on. Vidyadhara Gödem
decoded the texts, had them transcribed, and then transmitted them
to worthy students. Soon the teachings of the Northern Treasures
spread to all regions of Tibet.
The most remarkable feature of the Northern Treasures
transmissions, the most famous and the most highly praised, is its
Dzogchen section. It is within this section that the great
collection of Dzogchen instructions known as Künzang Gongpa
Zangthal is found. It is a complete system of teachings covering
all aspects of Mahasandhi, from the first introductory levels to
the highest secret instructions of thögal. Praised by many masters
for its profundity and clarity, it has been the source of the
highest realization for countless practitioners. It is in fact
considered as one of the three supreme transmissions of Dzogchen,
together with Nyingthig Yabzhi of Longchenpa and Ati Zabdön Nyingpo
of Terdag Lingpa. It is said that the bare fact of receiving the
empowerment of Künzang Gongpa Zhangthal closes forever the door to
the lower states of existence and is the unerring source of
boundless benefit.
The third incarnation of Rigzin Gödem, Ngagi Wangpo (1580-1639),
established the great Monastery of Dorje Drak in Central Tibet,
which quickly became renowned as one of the most important centers
of study and practice of the Nyingma School. This Dorje Drak
tradition of the Northern Treasures has been transmitted
uninterruptedly up to the present day and today Kyabje Taklung
Tsetrul Rinpoche is its most revered lineage holder and one of the
senior most living masters within the Nyingma School of Tibetan
Buddhism. Kyabje Rinpoche bestowed the entire Kama transmissions
(Oral Transmissions Lineage) in the Mindrolling Monastery to a vast
assembly in 1997.
Kyabje Taklung Tsetrul Rinpoche then transmitted the entire
Rinchen Terdzöd to thousands of tulkus, khenpos, monks, nuns and
practitioners in 2008-2009. It was an historic and most marvelous
event benefitting countless sentient beings. We hope and pray that
the Künzang Gongpa Zangthal transmissions will also bring similar
blessings and benefit to the entire Buddhist world.