Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 56

Sanskrit:

निर्बिभेद विराजस्त्वग्रोमश्मश्रवादयस्तत: ।तत ओषधयश्चासन् शिश्नं निर्बिभिदे तत: ॥ ५६ ॥

ITRANS:

nirbibheda virājas tvag-roma-śmaśrv-ādayas tataḥtata oṣadhayaś cāsanśiśnaṁ nirbibhide tataḥ

Translation:

Then the universal form of the Lord, the virāṭ-puruṣa, manifested His skin, and thereupon the hair, mustache and beard appeared. After this all the herbs and drugs became manifested, and then His genitals also appeared.

Purport:

The skin is the site of the touch sensation. The demigods who control the production of herbs and medicinal drugs are the deities presiding over the tactile sense.