सहस्रशः सन्तु हठेषु कुम्भाः सम्भाव्यते केवलकुम्भ एव ।कुम्भोत्तमे यत्र तु रेचपूरौ प्राणस्य न प्राकृतवैकृताख्यौ ॥ १० ॥
In plain words
Let the haṭha manuals count out their thousand retentions — only kevala kumbhaka is held in regard here. In that highest retention the breath neither empties nor fills: neither the breathing that runs on its own nor the breathing you engineer is left.
Close to the Sanskrit
Let there be kumbhakas by the thousands in the haṭha systems; only the kevala kumbhaka is esteemed — that highest retention in which the two movements of prāṇa, exhalation and inhalation, named natural and modified, are not.