sn.14.30 Saṁyutta Nikāya (Linked Discourses)

Four Elements

At one time the Buddha was staying near Sāvatthī in Jeta’s Grove, Anāthapiṇḍika’s monastery. …
“Mendicants, there are these four elements.
What four?
The elements of earth, water, fire, and air.
These are the four elements.”