Sarvatathāgatatattvasaṃgraha

Sarvatathāgatatattvasaṃgraha (T. de bzhin gshegs pa thams cad kyi de kho na nyid bsdus pa; C. Yiqie rulai zhenshishe dasheng xianzheng sanmei dajiaowang jing; 切如來眞實攝大乘現證三昧大敎王經), or "Compendium of Principles of all the Tathagatas," is one of the most important Buddhist tantras. "Likely dating from the late seventh century, the text presented a range of doctrines, themes, and practices that would come to be regarded as emblematic of tantric practice.

In East Asia, the first chapter of this text was particularly influential. A version of this chapter was translated earlier than the rest of the Sarvatathāgatatattvasaṃgraha. This version, as an independent text, is known as the Vajrasekhara Sutra.

The full text is also known by the title Tattvasaṃgraha (T. de kho na nyid bsdus pa).

Further reading:

• Robert E. Buswell Jr., Donald S. Lopez Jr., The Princeton Dictionary of Buddhism (Princeton: 2014), s.v. Sarvatathāgatatattvasaṃgraha
• The Compendium of Realities
• Tattvasaṃgraha Tantra, Wikipedia