The Dhyāna sutras or "meditation summaries" or also known as The Zen Sutras are a group of early Buddhist meditation texts which are mostly based on the Yogacara meditation teachings of the Sarvāstivāda school of Kashmir circa 1st-4th centuries CE. Most of the texts only survive in Chinese and were key works in the development of the Buddhist meditation practices of Chinese Buddhism.
Early Buddhist texts (EBTs), early Buddhist literature or early Buddhist discourses are parallel texts shared by the early Buddhist schools.
The most widely studied EBT material are the first four Pali Nikayas, as well as the corresponding Chinese Āgamas.
However, some scholars have also pointed out that some Vinaya material, like the Patimokkhas of the different Buddhist schools, as well as some material from the earliest Abhidharma texts could also be quite early.
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