四不坏信 (四不壞信) sì bù huài xìn

sì bù huài xìn set phrase four objects of indestructible faith
Domain: Buddhism 佛教
Notes: Sanskrit equivalent: catvāro 'vetya-prasādāḥ (Muller, AC 2017, 'Digital Dictionary of Buddhism', http://www.buddhism-dict.net/ddb/)