Readings from The Island by Ajahn Pasanno and Ajahn Amaro, Chapter 3, pp. 64-67. Read by Ajahn Amaro:
Suttas: MN 43.11; Ud 1.10; Iti 94.
Master Hsüan Hua, Sixth Patriarch’s Dharma Jewel Platform Sūtra, with Commentary, p. 149.
Śhūrangama Sūtra 1.169.