དེ་ལ་ནང་གི་མེའི་ཁམས་གང་ཞེ་ན།
Everything in the body related to heat that lends beings their complexion; that causes the body to be hot, to steam; that causes inflammation, fever, and burning; and that digests what one has eaten, drunk, chewed, and tasted is referred to as the internal fire element.
Emptiness, Elements, Tathagatas