sn.18.9 Saṁyutta Nikāya (Linked Discourses)
Elements
At Sāvatthī.“What do you think, Rāhula?
Is the earth element permanent or impermanent?”
“Impermanent, sir.” …
“… the water element …
the fire element …
the air element …
the space element …
Is the consciousness element permanent or impermanent?”
“Impermanent, sir.” …
“Seeing this, a learned noble disciple grows disillusioned with the earth element, water element, fire element, air element, space element, and consciousness element …”