The Essence of Tantra

(25) In the twentieth chapter, the rules of conduct and duties to be followed after initiation are explained. This includes the observance of essential worship, holy days, as well as the rituals for the pavitraka purification thread, the method of scriptural commentary, atonement for misconduct, and the ritual of worshipping the teacher guru-pūjā.

(26) In the twenty-first chapter, the authority of this scripture is primarily established.

(27) In the twenty-second chapter, the method of the kulayāga the secret sacrifice of the Kula lineage, characterized by both external and internal aspects, is described.

Although the specific time of composition for this work is not stated directly, it is inferred through a systematic process of compilation. The author, the venerable teacher Abhinavagupta, composed a specific work titled Īśvarapratyabhijñāvimarśinī Reflections on the Recognition of the Lord. In that work, the following verse appears:

"At the end of the age, in the final year of the century original: "antye yugāṃśe tithi-śaśila-dhisṭhe mārgaśīrṣāvasāne"..."

By this verse, the year of its composition is explicitly specified as 4115 of the Kali era (which corresponds to 1014 CE).

Following that, the commentary on the Parātrīśikā The Supreme Thirty Verses was composed by the same acclaimed teacher for the sake of his student, the grandson of Śrīvallabha, a minister to the King of Kashmir, Yaśaskara. The reign of King Yaśaskara lasted from 4041 to 4050 of the Kali era.