The six metaphors from the Buddhist Diamond Sutra (dream, illusion, bubble, shadow, dew, and lightning) used to illustrate the fleeting and unreal nature of all things.

Art name of the Ming dynasty painter Tang Yin 唐寅 táng​yín, also known as Tang Bohu 唐伯虎 táng​bó​hǔ, referring to the Buddhist six metaphors