Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 40
Sanskrit:
शृतं पयसि नैवेद्यं शाल्यन्नं विभवे सति ।ससर्पि: सगुडं दत्त्वा जुहुयान्मूलविद्यया ॥ ४० ॥
ITRANS:
śṛtaṁ payasi naivedyaṁśāly-annaṁ vibhave satisasarpiḥ saguḍaṁ dattvājuhuyān mūla-vidyayā
Translation:
If one can afford to, one should offer the Deity fine rice boiled in milk with clarified butter and molasses. While chanting the same original mantra, one should offer all this to the fire.