byin rlabs mchog gi sprul pa

“The supreme emanations of blessings” (byin rlabs mchog gi sprul pa) are renowned as the Three Sources of the Doctrine (bstan pa’i btsas gsum). They are also known as the great self-existing emanations of enlightened body, speech and mind (rang byung gi sprul pa chen po). [RY]

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The supreme emanations of blessings appear simultaneously with the twelve buddhas, and in the same twelve worlds, to benefit beings. They appear in the form of three miraculous phenomena that deserve special attention in that they serve as sources for the Dzogchen teachings in our kalpa. To paraphrase Gyurmey Tsewang Chokdrub’s Great Drum of the Gods:
The vajra of dharmata which has spontaneously appeared from the blessings of the Great Perfection, the true source of the dharmakaya doctrine on this Jambu continent, and is made from one hundred precious substances. The scripture which has spontaneously appeared from the blessings of the Self-Existing Single Child of the Doctrine, the true source of the sambhogakaya doctrine, is also made from one hundred precious substances and is a volume four fingers widths wide emitting the natural sound of dharmata.
The statue which has spontaneously appeared from the blessings of the twelve nirmanakaya teachers, is also made from one hundred precious substances.
These three supreme emanations of blessings are formed spontaneously, transcend birth and death, and possess boundless miraculous power and virtues that ensure that every person who encounters their sight, sound or touch will be liberated, and their material body will vanish. For every nirmanakaya buddha who has appeared, now appears and will appear, these three emanations form the support for the doctrines of their body, speech and mind.
From:Wellsprings of the Great Perfection