The Great Liberation Tantra3.79
अनेन ब्रह्ममन्त्रेण भक्ष्यपेयादिकञ्च यत् ।
दीयते परमेशाय तदेव पावनं महत् ॥७९॥
anena brahmamantreṇa bhakṣyapeyādikañca yat |
dīyate parameśāya tadeva pāvanaṃ mahat ||79||
— with this ; — Brahman-mantra ; — food, drink, and the rest ; — whatever ; — is offered ; — to the supreme lord ; — that very thing ; — purifying ; — great Whatever food, drink, and the like is offered to the supreme lord with this Brahman-mantra—that very thing becomes a great purifier.