Now there are four Vedas, Rig Veda, Yajur Veda, Sama Veda, and Atharva Veda. The first of these is the Rig Veda. When I say first, it's because it's believed that it was written before the other Vedas, as early as 3,500 years ago. The other three are also pretty old, probably older than 3,000 years old. Now these four texts are a combination of rituals, of hymns, of mantras, of songs, and of philosophy. For example, Rig Veda, Rig you can translate as meaning praise, so it's knowledge of ways to praise, praise the eternal or praise God. Yajur Veda you could view as these prose mantras, knowledge of these prose mantras is Yajur Veda.