The neuter term brahma is used in the Rigveda both in the abstract sense of "devotion, worship," and in the concrete sense of "devotional rite, prayer, hymn."
Whilst the two last priests have assigned to them special liturgical collections of the texts to be used by them, the Samaveda-samhita and Yajurveda-samhita respectively, the Hotri has to deal entirely with hymns and verses taken from the Rigveda-samhita, of which they would, however, form only a comparatively small portion.
The Udgatri's duties being mainly confined to the chanting of hymns made up of detached groups of verses of the Rigveda, as collected in the Samaveda-samhita, the more important Brahmanas of this sacerdotal class deal chiefly with the various modes of chanting, and the modifications which the verses have to undergo in their musical setting.
As regards the Brahmanas of the Rigveda, two of such works have been handed down, the Aitareya and the Kaushitaki (or Sankhayana)-Brahmanas, which have a large amount of their material in common.
The Rigveda (3, 8) describes it as a tree well lopped with axe, anointed and adorned by the priest.
In the Rigveda he is represented as the god of prayer, aiding Indra in his conquest of the cloud-demon, and at times appears to be identified with Agni, god of fire.
The Vedanta aphorisms), the Gita, the Rigveda and many Upanishads.