Then he sacrifices, saying: 'Adoration to Vâyu (air), who dwells in the sky, who dwells in the world. Obtain that world for me, the sacrificer! That is the world Tor the sacrificer!'

In plain words: The worshipper makes his offering and bows to Vayu, the god of the air who lives in the sky. He asks Vayu to win that world for him.