Lord Brahmā said: The mouth of the virāṭ-puruṣa [the universal form of the Lord] is the generating center of the voice, and the controlling deity is Fire. His skin and six other layers are the generating centers of the Vedic hymns, and His tongue is the productive center of different foodstuffs and delicacies for offering to the demigods, the forefathers and the general mass of people.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
ब्रह्मोवाच । वाचां वह्नेर्मुखं क्षेत्रं छन्दसां सप्त धातवः । हव्यकव्यामृतान्नानां जिह्वा सर्वरसस्य च
brahmovāca | vācāṃ vahnermukhaṃ kṣetraṃ chandasāṃ sapta dhātavaḥ | havyakavyāmṛtānnānāṃ jihvā sarvarasasya ca
SB 2.6.1