Skanda Purana — Prabhasa Khanda, Shloka 43
भाजनेषु च तिष्ठत्सु स्वस्तिं कुर्वन्ति ये द्विजाः । तदन्नमसुरैर्भुक्तं निराशाः पितरो गताः
bhājaneṣu ca tiṣṭhatsu svastiṃ kurvanti ye dvijāḥ | tadannamasurairbhuktaṃ nirāśāḥ pitaro gatāḥ
当器皿仍然摆着之时，若二次生者过早宣诵“svasti”（吉祥祝祷），那食物便为阿修罗所食，而祖灵（Pitṛ）失望离去。
Skanda (deduced from Prabhāsa-khaṇḍa māhātmya narration style)
Tirtha: Prabhāsa-kṣetra
Type: kshetra
Scene: A śrāddha meal scene: vessels still standing with food; a brāhmaṇa raises hand to say ‘svasti’ too early; shadowy asura figures consume the subtle essence; luminous pitṛ figures turn away with disappointed faces, fading into the background.
FAQs
Correct sequence matters in dharma; premature completion-signals can nullify the intended recipient of the offering.
Prabhāsa-kṣetra, where the śrāddha procedure is taught with cautions to protect its fruit.
Do not utter concluding benedictions (‘svasti’) while the ritual vessels/serving is still in progress; complete the rite in proper order.