। ॥ ९१६ ॥
In plain words
The thought 'I am Brahman' is declared to be the inhalation called pūraka. Following that, the absolute stillness of that mental state is kumbhaka, the true restraint of breath.
Close to the Sanskrit
The thought 'I am indeed Brahman' which is the mental modification, that is declared to be the inhaling breath pūraka; then the immovability of that mental state is kumbhaka, the restraint of breath.