Śrāddha-kalpa: Dāna-phala-nirdeśa
Gifts in Śrāddha and Their Fruits
सर्पिःस्निग्धानि सर्वाणि दध्ना संस्कृत्य भोजयेत् / श्राद्धेष्वेतानि यो दद्यात्पद्मं स लभते निधिम्
sarpiḥsnigdhāni sarvāṇi dadhnā saṃskṛtya bhojayet / śrāddheṣvetāni yo dadyātpadmaṃ sa labhate nidhim
Let all foods be made rich with ghee and prepared with curd, then served; whoever gives these in the śrāddha attains the treasure called Padma-nidhi.