Verse 15

चित्तं प्राणपरिस्पन्दमाहुरागमभूषणाः ।तस्मिन्संरोधिते नूनमुपशान्तं भवेन्मनः

In plain words

Citta, those who are the very ornament of the āgamas declare to be the vibration of prāṇa; when that vibration is restrained, the mind surely comes to rest.