व्यासशिष्योत्पत्तिवर्णन (Origins/Enumeration of Vyāsa’s Disciplic Succession) — Chapter on Vedic Transmission Lineages
चतुर्थोंऽगिरसः कल्पः शान्तिकल्पश्च पञ्चमः / श्रेष्ठास्त्वथर्वणामेते संहितानां विकल्पकाः
caturthoṃ'girasaḥ kalpaḥ śāntikalpaśca pañcamaḥ / śreṣṭhāstvatharvaṇāmete saṃhitānāṃ vikalpakāḥ
The fourth is the Āṅgirasa Kalpa, and the fifth the Śānti Kalpa. These are esteemed as the finest arrangers of the variant recensions of the Atharvaṇa saṃhitās.