Verse 8

भूतप्राणानिलं तेन गन्धवाहेन तेन च ।निविशन्ति शरीरेषु जीवा गच्छन्ति वीर्यताम्

In plain words

By that wind, and by that carrier of fragrance, jīvas enter the prāṇa-wind of beings and settle into bodies, and come to the state of vīrya, of seed.