रूपमात्राद्विकुर्वाणात्तेजसो दैवचोदितात् ।
रसमात्रमभूत्तस्मादम्भो जिह्वा रसग्रहः ॥०४॥

rÅ«pa-mÄtrÄd vikurvÄṇÄt
tejaso daiva-coditÄt
rasa-mÄtram abhÅ«t tasmÄd
ambho jihvÄ rasa-grahaḥ

1 times this text was mentioned in purports to other texts: LSB(1)

 rÅ«pa-mÄtrÄt - which evolves from the subtle element form; vikurvÄṇÄt - undergoing transformation; tejasaḥ - from fire; daiva-coditÄt - under a superior arrangement; rasa-mÄtram - the subtle element taste; abhÅ«t - became manifested; tasmÄt - from that; ambhaḥ - water; jihvÄ - the sense of taste; rasa-grahaḥ - which perceives taste.


Text

By the interaction of fire and the visual sensation, the subtle element taste evolves under a superior arrangement. From taste, water is produced, and the tongue, which perceives taste, is also manifested.

Purport

The tongue is described here as the instrument for acquiring knowledge of taste. Because taste is a product of water, there is always saliva on the tongue.