Ānanda (Pali and Sanskrit: आनन्द; 5th4th century BCE) was the primary attendant of the Buddha and one of his ten principal disciples. Among the Buddha's many disciples, Ānanda stood out for having the best memory. Most of the texts of the early Buddhist Sutta-Piṭaka (सुत्त पिटक; सूत्र-पिटक, Sūtra-Piṭaka) are attributed to his recollection of the Buddha's teachings during the First Buddhist Council. For that reason, he is known as the Treasurer of the Dhamma, with Dhamma (धर्म, dharma) referring to the Buddha's teaching. In Early Buddhist Texts, Ānanda was the first cousin of the Buddha. Although the early texts do not agree on many parts of Ānanda's early life, they do agree that Ānanda was ordained as a monk and that Puṇṇa Mantānīputta (पूर्ण मैत्रायणीपुत्र, Pūrṇa Maitrāyaṇīputra) became his teacher. Twenty years in the Buddha's ministry, Ānanda became the attendant of the Buddha, when the Buddha selected him for this task. Ānanda performed his duties with great devotion and care, and acted as an intermediary between the Buddha and the laypeople, as well as the saṅgha (संघ). He accompanied the Buddha for the rest of his life, acting not only as an assistant, but also a secretary and a mouthpiece.
Scholars are skeptical about the historicity of many events in Ānanda's life, especially the First Council, and consensus about this has yet to be established. A traditional account can be drawn from early texts, commentaries, and post-canonical chronicles. Ānanda had an important role in establishing the order of bhikkhunīs (भिक्षुणी), when he requested the Buddha on behalf of the latter's foster-mother Mahāpajāpati Gotamī (महाप्रजापती गौतमी, Mahāprajāpatī Gautamī) to allow her to be ordained. Ānanda also accompanied the Buddha in the last year of his life, and therefore was witness to many tenets and principles that the Buddha conveyed before his death, including the well-known principle that the Buddhist community should take his teaching and discipline as their refuge, and that he would not appoint a new leader.