ततस्तृतीयावसरे प्रणवस्योपशान्तिदे ।पूरणप्रपूरको नाम प्राणानामभवत्क्रमः
In plain words
Then, on the third, peace-giving occasion of the praṇava, there arose among the prāṇas the process named pūraṇa-prapūraka, the filling that fills to the full.
ततस्तृतीयावसरे प्रणवस्योपशान्तिदे ।पूरणप्रपूरको नाम प्राणानामभवत्क्रमः
Then, on the third, peace-giving occasion of the praṇava, there arose among the prāṇas the process named pūraṇa-prapūraka, the filling that fills to the full.