The Atharvaveda (Sanskrit: अथर्ववेद, atharvaveda, a tatpurusha compound of atharvan, an ancient Rishi, and veda meaning "knowledge") is a sacred text of Hinduism, and one of the four Vedas, often called the "fourth Veda". According to tradition, the Atharvaveda was mainly composed by two groups of rishis known as the Atharvanas and the Angirasa, hence its oldest name is Ātharvāṅgirasa. In the Late Vedic Gopatha Brahmana, it is attributed to the Bhrigu and Angirasa. Additionally, tradition ascribes parts to other rishis, such as Kauśika, Vasiṣṭha and Kaśyapa. There are two surviving recensions (śākhās), known as Śaunakīya (AVS) and Paippalāda (AVP).