The second wind, called Avaha blows with a loud noise. It is this wind that make Soma and the other luminaries rise and appear. Within the body that wind is called Udana by the wise.
आवहो नाम संवाति द्वितीयः श्वसनो नदन्॥ उदयं ज्योतिषां शश्वत् सोमादीनां करोति यः। अन्तर्देहेषु चोदानं यं वदन्ति मनीषिणः॥