Saṃyutta Nikāya 22
Connected Discourses on the Aggregates
18. Impermanent with Cause
“Feeling is impermanent…. Perception is impermanent…. Volitional formations are impermanent…. Consciousness is impermanent. The cause and condition for the arising of consciousness is also impermanent. As consciousness has originated from what is impermanent, how could it be permanent?