Verse 30

धावमानमधोभागे चित्तं प्रत्याहरेद्बलात् ।प्रत्याहारेण पतितमधो वारीव सेतुना

In plain words

One should forcibly draw back the citta as it rushes downward, by pratyāhāra — as water that has fallen and flows downward is checked by a dam.