Yoga Sūtra Chapter Three verse 10
तस्य प्रशान्तवाहिता संस्कारत् ॥१०॥
tasya praśānta-vāhitā saṃskārāt ||10||
Of this tendency a serene flow.
tasya - its, of it, of thispraśānta - serenevāhitā - flowsaṃskāra - tendencies, psychological imprint, mental impression, habitual potency; making ready, preparation; a sacred or sanctifying ceremony