Matsya Purana — Śarkarā-Saptamī Vrata: The Sugar Offering Rite to Savitṛ
अमृतं पिबतो वक्त्रात् सूर्यस्यामृतबिन्दवः निपेतुर्ये धरण्यां तु शालिमुद्गेक्षवः स्मृताः //
amṛtaṃ pibato vaktrāt sūryasyāmṛtabindavaḥ nipeturye dharaṇyāṃ tu śālimudgekṣavaḥ smṛtāḥ //
As the Sun drank the nectar, drops of that nectar fell from his mouth onto the earth; those drops are remembered as rice, green gram, and sugarcane.
It gives an etiological creation detail: certain staple crops arise from amṛta-droplets linked to Sūrya, emphasizing divine, life-sustaining origins rather than describing dissolution.
By sacralizing key food-crops (rice, mudga, sugarcane), it supports the dharmic duty of ensuring agriculture, food distribution, and proper offerings—central to household rites and royal welfare policies.
Ritually, these crops are validated as auspicious, fit for naivedya and yajña materials; architecturally, there is no direct Vāstu rule here, but it underpins temple/household provisioning for daily offerings.