治禪病祕要法 2.60

2.60

At one time the Buddha was in Śrāvastī, at the Jeta Grove, Anāthapiṇḍada's Park, at the dwelling place of the Nalīra spirit, in the lecture hall built by Queen Mallikā. One thousand sons of elders, such as Raśmiguhya and others, had just renounced the household life and requested the Venerable Ānanda, Mahākāśyapa, Śāriputra, and others to be their upādhyāyas; Mahākāśyapa was teaching the thousand monks counting the breath in a quiet place.