The Yoga Sutras of Patañjali Chapter IV

इति पतञ्जलयोगसूत्रे समाधिपादः प्रथमः समाप्तः

iti patañjalayogasūtre samādhipādaḥ prathamaḥ samāptaḥ

Here lies Chapter 1, “On Bringing Into Harmony”,
in the Yoga Sutras of Patañjali