Overview Early Buddhism in India is generally divided into various monastic fraternities, or
nikāyas. Conventionally numbering eighteen, the actual count varied over time. The doctrinal orientation of each school differed somewhat, as did the number of
piṭakas ("baskets") in their canon. An example of this is the
Dharmaguptaka, which included a Bodhisattva
piṭaka and a
Dhāraṇī piṭaka. In the Mahāsāṃghika branch The Mahāsāṃghika nikāyas generally advocated the transcendental and supramundane nature of the
buddhas and
bodhisattvas, and the fallibility of
arhats. Therefore, for the Mahāsāṃghikas, the bodhisattva ideal and buddhahood was advocated over the ideal of becoming an arhat. Avalokitavrata wrote of the
Mahāsāṃghikas as using a "Great Āgama Piṭaka", which is then associated with Mahāyāna sūtras such as the
Prajñāparamitā and the
Ten Stages Sutra. In the
Caitika group of nikāyas, the Pūrvaśailas and the Aparaśailas each were known to have the '''' in
Prakrit. Bhāvaviveka also wrote of the Siddhārthikas using a Vidyādhāra Piṭaka, and the Pūrvaśailas and Aparaśailas both using a Bodhisattva Piṭaka, implying organized collections of Mahāyāna texts within these Mahāsāṃghika nikāyas.
In the Sthaviravāda branch In the
Sthavira nikāya, the Sarvāstivādins were a major nikāya. The
Sarvāstivādin Mahavibhasa| is known to employ the outlook of Buddhist practice as consisting of three vehicles:
Śrāvakayāna,
Pratyekabuddhayāna, and
Bodhisattvayāna. References to the Bodhisattvayāna and the practice of the Six
pāramitās are commonly found in Sarvāstivāda works as well. The Theravada sect from
Sri Lanka generally accepts the three vehicles, but categorizes these as three different types of
bodhi, or enlightenment. The Theravada nikaya only uses the Pāli Canon, which has three piṭakas, and does not contain separate literature for bodhisattvas.
Walpola Rahula writes of this, "At the end of a religious ceremony or an act of piety, the bhikkhu who gives benedictions, usually admonishes the congregation to make a resolution to attain Nirvana by realising one of the three Bodhis - Sravakabodhi, Pratyekabodhi or Samyaksambodhi - as they wish according to their capacity." == Relationship to Mahāyāna ==