Thou art the best carrier for the Gods, thou art the first offering to the Fathers. Thou art the true work of the Rishis, of the Atharvângiras.
In plain words: This verse continues a hymn of praise to Prana, the life-breath that keeps every living thing alive. It says Prana is what carries offerings to the gods and to the ancestors. It is also the real power behind the work of the ancient seers, the Atharvangiras.